Abstract: A wear strip arrangement for an endless belt conveyor for a feederhouse of an agricultural combine includes a first body that is configured to be attached to a slat that in turn is attached to the endless belt.

Abstract: A bicycle front derailleur includes a base member to be mounted to a bicycle frame, a chain guide, a first link pivotally connected to the chain guide about a first pivot axis, and a second link pivotally connected to the chain guide about a second pivot axis. The chain guide includes a link-connecting structure pivotally connected to the first link. The link-connecting structure includes a first link-connecting portion and a second link-connecting portion. The first link includes a first chain guide-connecting portion and a second chain guide-connecting portion. At least one of the first link-connecting portion and the second link-connecting portion is located between the first chain guide-connecting portion and the second chain guide-connecting portion.

Abstract: A bicycle frame includes a first frame member and a second frame member configured to be pivotally connected to the first frame member about a pivot axis. The first frame member includes a threaded hole, through which a fixing bolt for fixing a mounting member of a bicycle front derailleur to the first frame member passes, and an abutting portion configured to restrict rotation of a mounting member of a bicycle front derailleur around the fixing bolt by abutting the mounting member. The threaded hole is located on a front side of the pivot axis.

Abstract: A packaging machine for placing articles into a carton includes rotating flight assemblies that receive a carton or carton blank, and rotate the carton blank and carton with articles while the flight assemblies move downstream. The flight assemblies each include two fixed segments and one segment that includes a block and associated bracket that rotate as the flight assembly is pulled through the machine by a conveying system. A method includes carton blanks being fed by a carton feeder onto the flight assemblies. Articles are formed into an article group, which is then placed onto a carton blank. As the blank and article group move in a downstream direction, the side panels of the carton blank are wrapped around the article group and the carton and article group are rotated to assist in closing the carton end flaps.

Abstract: A bicycle sprocket comprises a sprocket element, a first shifting facilitation projection, and a second shifting facilitation projection. The sprocket element includes a rotational center axis, a sprocket body, and a plurality of sprocket teeth. The sprocket body includes a radially outer periphery disposed about the rotational center axis. The plurality of sprocket teeth are arranged on the radially outer periphery. The first shifting facilitation projection is coupled to the sprocket element to engage with an inner link plate of a bicycle chain when the bicycle chain is shifted from a smaller sprocket to the bicycle sprocket. The second shifting facilitation projection is coupled to the sprocket element to engage with an outer link plate of the bicycle chain when the bicycle chain is shifted from the smaller sprocket to the bicycle sprocket.

Abstract: A bicycle sprocket comprises a sprocket body, a plurality of sprocket teeth, and at least one chain-curvature limiting protuberance. The sprocket body is configured to be rotatable about a rotational center axis. The plurality of sprocket teeth extend radially outward from an outer periphery of the sprocket body. The at least one chain-curvature limiting protuberance is configured to limit axial curvature of a bicycle chain engaging with an independent neighboring bicycle sprocket which is adjacent to the bicycle sprocket without another sprocket between the bicycle sprocket and the independent neighboring bicycle sprocket. The axial curvature is curvature of the bicycle chain relative to the bicycle sprocket when viewed from a radial direction perpendicular to the rotational center axis. The at least one chain-curvature limiting protuberance is disposed on at least one of an outward facing side and an inward facing side.

Abstract: A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket comprises a first sprocket body, a first shifting facilitation area, a plurality of first chain-driving teeth, and a first outer diameter. The second sprocket comprises a second sprocket body, a plurality of second chain-driving teeth, a second outer diameter, and a support protuberance. The support protuberance protrudes from the second sprocket body toward the first sprocket. The support protuberance is provided in a circumferential support area on the second sprocket. The circumferential support area is configured to face a circumferential area on the first sprocket in an axial direction. The circumferential area extends from a third tooth to a fifth tooth in a circumferential direction with respect to a rotational center axis.

Abstract: A bicycle front derailleur is basically provided with a base member and a movable member. The base member includes a bicycle mounting portion. The movable member is movably supported to the base member between a retracted position and an extended position relative to the base member. The movable member includes a first guide plate having a first inner surface and a second guide plate having a second inner surface. The first and second inner surfaces face each other to form a chain receiving slot therebetween. The second guide plate includes an adjustable guide member that is arranged at the chain receiving slot to move between at least two different positions relative to the second guide plate.

Abstract: Disclosed are bicycle chain rings for bicycles having specially shaped ramps with lifting surfaces for improved up-shifting performance. Additional embodiments of the bicycle chain rings of the present invention may be configured with one or more additional features formed within the chain rings including a transition slide, a tapered ramp face, a ramp bridge, a ramp lead, a trailing transition slide and a wear pin.

Abstract: The present disclosure relates to a chain guide structure including a guide supporter integrally formed with a chain case and provided with at least a plurality of assembly holes, and a guide body having at least a plurality of assembly protrusions which correspond to the assembly holes for being coupled with the guide supporter, wherein the guide body is provided with a guide wall that is inserted into a space between the guide supporter and a chain. As a result, It is possible to reduce the constituent elements such as bolts, save manufacturing cost, simplify the chain guide structure, and reduce weight or size of the chain guide structure.

Abstract: A chain drive includes a chain configured to rotate in a closed loop forming a load track and a return track interconnected by first and second turnaround sections; a drive sprocket for driving the chain, the drive sprocket being located in the first turnaround section of the closed loop; and a polygon compensation system for compensating the polygon effect of the chain. At least one component of the polygon compensation system is located within at least one turnaround section.

Abstract: A first sprocket is capable of engaging with a chain. The first sprocket has a first sprocket main body, a plurality of teeth disposed along a circumferential direction on the radially outer side of the first sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is greater than the second maximum axial width. The first tooth is formed to be capable of engaging with an outer link plate of the chain. The second tooth is formed to be capable of engaging with an inner link plate of the chain.

Abstract: An object of the present invention is to provide a guide shoe that can prevent a shortage of lubricating oil and supply the lubricating oil onto a sliding surface of the shoe in a favorable manner. To achieve the above object, the present invention provides a guide shoe that has a shoe surface for slidably guiding a running chain CH. A plate guide groove extending along a chain running direction D and guiding link plates L of the chain CH is provide in the shoe surface. An oil guide part having a pair of guide walls is provided in the bottom surface of the plate guide groove. The pair of guide walls are each formed such as to face a rear side in the chain running direction D and converge to each other toward a front side in the chain running direction D.

Abstract: A method for producing a tensioning or guide rail with a base body, and a vibration absorber arranged on the base body is provided, comprising the steps of: providing a base body, at least partially embedding the base body into plastic material that is in a flowable state, and hardening the plastic material to obtain a vibration absorber that is captively arranged on the base body. The method also relates to a respective rail and to a continuous drive for a combustion engine.

Abstract: A method of limiting articulation of a chain joint in a chain assembly using plurality of chain plates. The chain plates prevent articulation of the chain assembly in one direction. The chain plates, as an example, include a neck portion and a body portion. The neck portion has a width less than a width between a pair of first side bars. The first side bars have end portions mounted on a chain barrel. The neck portion is attached to the first side bars. Also, a pair of second side bars are mounted on the chain barrel. The body portion of the chain plate has a width greater than a width between the second side bars. The body portion rest on top of a portion of the second side bars and prevents joint articulation of the second side bars in one direction during the movement of the chain assembly.

Abstract: A timing belt system for a vehicle may include a camshaft timing gear, a crankshaft timing gear, a timing belt which connects the two timing gears to each other so as to synchronize rotations of the two timing gears, and a tensioner which adjusts tension of the timing belt, may include: a case which has one side formed in an opened container shape, and is provided to cover the crankshaft timing gear, the camshaft timing gear, the timing belt, and the tensioner from a rear side direction; and a front side plate which is formed in a large plate shape, and coupled to the case from a front side direction so as to close one open side of the case, in which a blow-by gas passage, which recirculates blow-by gas, is formed in the case.

Abstract: One embodiment may include an automotive timing chain system component (10, 12) such as a tensioner arm (10) or a chain guide (12) that, during use, bears directly or indirectly against a chain (22) of an automotive timing chain system (14). The component (10, 12) may have an elongated body (16, 116) made into a generally hollow shape by a hydroforming process. The body may have a first open free end (26, 126) and a second open free end (28, 128).

Abstract: Longitudinal grooves having rectangular cross-sections are formed by surface pressing in the front and/or back surfaces of the metal base plate of a chain guide. In the case of a chain guide for a roller chain, the grooves can be positioned so that they are located opposite the parts of the shoe surface that is contacted by the link plates on both sides of the chain.

Abstract: A bicycle chain guide assembly that includes a chain guide member having a mounting portion adapted to be positioned adjacent a chain ring of a bicycle, and a contact member removably affixed to the mounting portion. The mounting portion extends in a chain-running direction and has a chain-ring side and an opposite side. The contact member includes a first end portion affixed to the mounting portion and a chain contact portion that extends from the first end portion in the chain-running direction and is positioned adjacent the chain-ring side of the mounting portion. A gap is defined between the chain-ring side of the mounting portion and the chain contact portion of the contact member.

Abstract: A bicycle chain guide assembly that includes a mounting bracket adapted to be affixed to a bicycle, and a movable member movably mounted to the mounting bracket. The movable member includes a chain guide portion adapted to be positioned adjacent a chain ring of the bicycle and below a bottom bracket of the bicycle. When the assembly is mounted on a bicycle with a chain-ring, the movable member can move in a first direction such that the chain guide portion moves toward an outer circumference of the chain-ring and the movable member can move in a second direction such that the chain guide portion moves away from the outer circumference of the chain ring.

Abstract: Apparatus and method for controlling an electric motor providing assistance to a bicycle rider based on measuring the mechanical power generated by the rider. The power generated by the rider is measured by measuring tension in a bicycle chain (or belt) and RPM. A chain (or belt) roller is carried at the free end of a cantilevered beam and the chain (or belt) rides over the roller. The resulting deflection of the cantilevered beam provides a measurement of chain tension. A control signal for the electric motor is generated based on a smoother version of the power generated by the rider.

Abstract: The chain guide mechanism includes a slack side guide, a tension side guide, and a link member that is capable of rotating about a predetermined rotary shaft provided so as to be fixed to an attachment subject. The link member includes a slack side pivot portion attached rotatably to the slack side guide, and the slack side pivot portion is disposed on an opposite side of the chain that is guided by the slack side guide to the predetermined rotary shaft, and in a lower position than the predetermined rotary shaft. The slack side guide is biased by its own weight toward a side of the chain that is guided by the slack side guide.

Abstract: A chain guide includes a guide base (21) disposed to face one side of a timing chain (5) for transmitting torque, and having an opposed pair of side plates (22) each formed with a plurality of shaft engaging portions (25) arranged along a circular arc. Roller shafts (31) have their ends supported by the respective shaft engaging portions (25) Rollers (41) for guiding the chain are rotatably supported by the respective roller shafts (31). Noncylidrical surface engaging portions are formed on the ends of the roller shafts (31) and on closed ends of the shaft engaging portions (50) to rotationally fix the roller shafts (31), thereby preventing the roller shafts (31) from rotating under drag torque applied from the rollers (41).

Abstract: A guide plate 4 is disposed on the outermost side in the width direction of a silent chain 1 comprising link plates 2 which are pivotably linked by means of linking pins 3. The guide plate 4 has a pair of pin holes 41 into which the linking pins 3 are inserted, and also has side end parts 42 which are disposed at both ends in the longitudinal direction thereof, and an upper end part 43 and a lower end part 44 which link the side end parts 42 in the longitudinal direction. The upper end part 43 and the lower end part 44 are formed with a tapered transverse section, and become steadily thinner toward the tip end.

Abstract: A transmission guide comprises a synthetic resin shoe supported by and integrally molded with a synthetic resin base by two-part molding. A guide length retaining mechanism, which can be formed by one or more protrusions on the back of the shoe and one or more cooperating recesses on the supporting surface of the base, retains the shoe against longitudinal movement relative to the base. A guide width retaining mechanism, which can be formed by projections on the edges of the shoe and cooperating holes formed in side walls extending from the supporting surface of the base, retains the shoe against widthwise movement relative to the base.

Abstract: Provided is a chain guide that offers improved assembly efficiency by a more easily engageable interlock structure, operates more quietly by reducing noise caused by collision between mating parts and looseness of the shoe, and improves durability by reducing wear and fatigue of the mating parts. A lateral interlock structure formed by hole parts 121 and mating protrusions 161 restricts relative displacement of the base 110 and the shoe 150. An opposite interlock structure formed by a groove part 131 and mating protrusions 171 restricts relative displacement of the base 110 and the shoe 150 in the height direction. The mating protrusions 161 and 171 are elastic mating elements. The lateral interlock structure and the opposite interlock structure are a snap-fit joint in which a meshed state is achieved through elastic deformation of the mating protrusions 161 and 171 that occurs in a moving process during assembly.

Abstract: The synthetic resin guide in accordance with the invention comprises an elongated synthetic resin shoe having a front surface for sliding contact with the transmission medium and a back surface opposite from the front surface and a plurality of engaging members disposed in longitudinally spaced relationship to one another. The guide also comprises an elongated synthetic resin base in contact with the back surface of the shoe and supporting the shoe, the base having a plurality of longitudinally spaced engaged portions each of which engages with one of the engaging members. One engaging member is fixed to the engaged portion with which it is engaged. The other engaging members are longitudinally movable relative to the engaged portions with which they are engaged. Thus, the guide allows longitudinal thermal expansion and contraction of the shoe relative to the base.

Abstract: The invention relates to a sliding element for use in a chain transmission apparatus, comprising a sliding contact section for engagement in sliding contact with a chain, wherein the sliding contact section consists of a plastic material comprising a matrix polymer and dispersed therein graphite platelets comprising platelet particles having a thickness of at most 250 nm. The invention relates to an engine comprising a first sliding element in sliding contact with a second element, wherein at least a sliding contact section is made of such a plastic material comprising such thin graphite platelets. The invention further relates to a chain transmission apparatus, comprising a chain, and a sliding element comprising (i) a sliding contact section engaged in sliding contact with the chain and (ii) a main body reinforcing and supporting the sliding contact section, wherein the sliding contact section consists of such a plastic material.

Abstract: One exemplary embodiment includes a U-shaped chain guide bracket including a base wall extending in a longitudinal direction from an upstream end to a downstream end of the base wall, and a pair of laterally opposed side walls extending away from the base wall and having laterally opposed mounting pads and apertures. The base wall and opposed side walls establish an upstream end, a downstream end, a central portion between the upstream and downstream ends, and a general U-shaped cross-section at least at each of the upstream and downstream ends and at the central portion. The bracket is formed from sheet metal.

Abstract: A chain transmission is provided which is capable of reducing friction loss in the transmission of power without the risk of compromising the durability of a chain guide mechanism and the chain. The chain transmission includes a chain and a chain guide mechanism. The chain guide mechanism includes a first guide and a second guide having a smaller radius of curvature than that of the first guide. The plurality of plates include a first plate and a second plate. The first plate has a backside height set such that the first plate does not contact the first guide when the first plate is guided by the first guide and such that the first plate contacts the second guide when the first plate is guided by the second guide.

Abstract: A chain guide is provided in which durability is increased, weight can be reduced, material cost is reduced, the uniformity of resin orientation is improved, dimensional errors, errors in shape, internal strains, and defects are reduced, and bending rigidity such as rigidity against deflection and torsion is augmented with a simple configuration. The chain guide is provided with reinforcing ribs at a guide main body. The reinforcing ribs include first inclined reinforcing ribs and second inclined reinforcing ribs that cross each other. A zone in which the reinforcing ribs are not present is provided in the intermediate portion between two support porting.

Abstract: A chain guide is provided which has a simple configuration, decreases the occupation space inside an engine room, while maintaining the necessary strength, rigidity, and durability, reduces the number of production steps and material waste, reduces the production cost, prevents vibrations and breaks during the use, and has high utility. A chain guide includes a guide shoe and a base member supporting the guide shoe along the chain running direction. A first insertion groove for receiving insertion of one end portion of the base member to fix the same and a second insertion groove for receiving insertion of the other end portion to fix the same are provided below the running guide portion 111 of the guide shoe.

Abstract: The occupation space of a chain inside an engine room can be reduced, while the necessary strength, rigidity, and durability are maintained, the sheet thickness can be decreased, the number of production steps and material waste can be reduced, stress concentration and strains during bending and fixing can be reduced, load offset during fixing and loosening of bolts or the like can be prevented, the increase in vibrations and noise during the use can be prevented, the maintenance operation load can be reduced, and utility can be increased with a simple configuration. A chain guide is provided with a base member supporting a guide shoe. The base member has a base mounting portion and base wall portions formed to sandwich the guide shoe from both sides in a width direction. The guide shoe has a guide shoe mounting portion at a position apart from the base mounting portion in the chain running direction.

Abstract: Embodiments of the present invention include bicycle chain rings for bicycles having specially shaped ramps with lifting surfaces for improved up-shifting performance. Additional embodiments of the bicycle chain rings of the present invention may be configured with one or more additional features formed within the chain rings including a transition slide, a tapered ramp face, a ramp bridge, a ramp lead, a trailing transition slide and a wear pin.

Abstract: There is provided a chain guide that reduces a space occupied by the chain guide in an engine room while maintaining required strength, rigidity, and durability with a simple configuration, reduces the number of manufacturing steps and the waste of a material, does not require a structure that permits an error, prevents increases in vibration and noise during use, and reduces the burden of a maintenance operation. The chain guide has a guide shoe and a base member that reinforces the guide shoe, and an attachment portion includes an attachment member that is provided separately from the guide shoe and the base member and can be fixed to at least one of the guide shoe and the base member or both of the guide shoe and the base member.

Abstract: A guiding device for guiding a belt of a belt-driven conical-pulley transmission. The device includes a first guiding section and a second guiding section that is spaced from the first guiding section, and between which the belt is guided in a running direction. The guiding sections have a longitudinal extent that corresponds to the running direction of the belt and a transverse extent that is perpendicular thereto, and lateral edge sections that delimit the guiding sections in the transverse direction. At least one guiding section has at least one longitudinal rib that extends in the longitudinal direction and that is positioned apart from the lateral edge sections in order to improve the guiding device structurally and functionally.

Abstract: By employing a simple configuration, a space required for engine room can be minimized while securing enough strength, rigidity, and durability, and a reduction in a material waste, manufacturing processes, and manufacturing cost can be accomplished while occurrence of a crack or breakage during use is prevented. A chain guide includes a guide shoe, a base member configured to reinforce the guide shoe, and attaching sections. The base member is formed by a bar made of a metal material.

Abstract: A safety apparatus safety apparatus for use with a sheave has a first plate suitable for placement over one side of the sheave, a second plate suitable for placement on an opposite side of the sheave, and a carriage positioned at a periphery of the first and second plates. The carriage extends across a gap between the plates. The carriage is movable along the peripheries of the first and second plates. The carnage includes a lust carriage and a second carriage which are independently movable with respect to each other. The carriage includes a first body, a second body, and a discoidal member pivotally mounted to the first and second bodies. The discoidal member has a hole suitable for allowing the cable of the sheave to pass freely therethrough.

Abstract: A chain guide member may include a base portion forming a body of a chain guide member and a protruding portion protruding from the base portion and configured to be in contact with a circumferential surface of a roller of a chain.

Abstract: A chain guide is provided by which a chain can be guided silently. The chain guide includes: a guide base arranged along a portion of the outer periphery of a chain for transmitting torque and elongated in the direction in which the chain travels; a plurality of roller shafts spaced apart from each other in the longitudinal direction of the guide base; and a plurality of rollers for guiding the chain. The rollers are rotatably supported by the respective roller shafts. The rollers guide the chain by rolling. An arrangement interval between each adjacent pair of the rollers is set such that any two of the pins by which pieces of the chain are joined together do not pass any two of the rollers at the same time.

Abstract: The invention provides a chain guide capable of reducing a space the guide occupies in an engine room while maintaining necessary strength, rigidity, and durability with a simple configuration, reducing manufacturing man-hour and a waste of a material, preventing an increase in vibration and noise during use without necessity of forming a structure for allowing an error, and reducing a maintenance work load. A chain guide includes a guide shoe and a base member configured to support the guide shoe. The base member includes a base attaching section extending perpendicularly to a chain traveling direction. The guide shoe includes a guide shoe attaching section extending perpendicularly to the chain traveling direction in a position spaced apart from the base attaching section in the chain traveling direction.

Abstract: The present invention is to suppress wear of outer diameter surfaces of chain guiding rollers (41) in a chain guide and extend the life. Respective shaft ends of a plurality of roller shafts (31) are supported by pairs of facing side plate portions (22) of guide bases (21) arranged to face each other in a one-side part of a timing chain (5) for transmitting torque. Each of the rollers (41) formed by a plurality of chain guiding roller bearings is rotatably supported by each of the plurality of roller shafts (31). Rollers whose surface hardness is greater than surface hardness of the timing chain (5) by 4 points or more of Rockwell hardness are used as the rollers (41), so as to prevent earlier wear of the outer diameter surfaces of the rollers (41) due to contact with the timing chain (5).

Abstract: A transmission guide comprises a synthetic resin shoe and a more rigid synthetic resin base, integrally molded by two-member molding. The base is formed with a pair of spaced, opposed, side walls extending in the direction of elongation of the base along opposite edges of a shoe-supporting surface of the base. These side walls engage respective side edges of the shoe, and extend past the front surface of the shoe so that they can restrict lateral movement of a transmission chain sliding along the front surface of the shoe. Indentations in the side walls receive protrusions formed on the edges of the shoe. Edges of the openings of the indentations are chamfered or convexly curved to avoid interference with the movement of the chain along the guide.

Abstract: A chain guide includes a plurality of roller shafts provided on one side of a timing chain for torque transmission and spaced from each other in the longitudinal direction of a guide base facing the timing chain. The respective roller shafts rotatably support chain guiding rollers in the form of needle roller bearings. The rollers are cylindrical members having the same diameter over the entire axial direction such that the rollers are movable in the axial direction relative to the timing chain. The rollers are supported so as to be movable in the axial direction. When the rollers and the timing chain move relative to each other in the axial direction and the rollers move relative to the roller shafts in the axial direction, contact portions between the rollers and the roller shafts are displaced in the axial direction, so that radial loads are not locally applied.

Abstract: In a transmission guide, a synthetic resin shoe and a synthetic resin base are integrally molded by two part molding. Strips projecting from a supporting surface of the base extend in parallel to the longitudinal direction of the base, and concave grooves formed in the shoe, which also extend in parallel to the longitudinal direction of the base and of the shoe, receive the strips of the base and are fused with the base.

Abstract: There is provided a chain guide capable of improving rigidity and durability without enlarging its structure to the side opposite to a chain travel surface with a simple configuration, and reducing the size of a guide shoe without increasing the number of components to thereby lower manufacturing cost. The chain guide includes the guide shoe and a guide body that supports the guide shoe, and the guide body has support wall portions that are provided near at least one side of both sides of the guide shoe in a width direction thereof so as to extend to the side of a chain at least at one position.

Abstract: A chain tensioner blade assembly shoe includes a first spring-receiving slot and a second spring-receiving slot. The first spring-receiving slot includes: (i) a first lower wall; (ii) a first outer wall; (iii) a first locking tab located adjacent the rear face of the shoe. The second spring-receiving slot includes: (i) a second lower wall; (ii) a second outer wall; (iii) a second locking tab located adjacent the rear face of the shoe. The first and second locking tabs extend only partially toward and are spaced from the inner surface of the shoe central portion. A spring is located in a spring-receiving region and includes a first end located in the first spring-receiving slot between the first outer wall and the first locking tab, a second end located in the second spring-receiving slot between the second outer wall and the second locking tab, and a central portion in contact with the inner surface of the shoe central portion.

Abstract: A chain guide that contacts a chain connecting a cam sprocket and a crank sprocket, and has a contact portion contacting the back of the chain in a length direction of the chain and a convex curved line in a cross-section of the contact portion.

Abstract: A guard for a chain and chain ring of a bicycle includes a bracket and a bracket extension. The bracket extension has a first end and a second end, and at least the second end is integrally formed. The second end includes a U-shaped configuration configured to house a chain retainer. The bracket and the bracket extension may be secured to one another using two fasteners. The bracket and the bracket extension may rotate relative to one another when only one of the fasteners is attached and may be fixed relative to one another when both of the fasteners are attached.

Abstract: Embodiments of the present invention include bicycle chain rings for bicycles having specially shaped ramps, tapers and profiled teeth for improved shifting performance. The embodiments of bicycle chain rings of the present invention may be configured for large chain rings on double cranksets and large and middle chain rings on triple cranksets. The embodiments of bicycle chain rings of the present invention may also be retrofitted to existing bicycle cranksets by replacing original chain rings. The embodiments of bicycle chain rings of the present invention may further be configured for any standard crankset mounting bolt configuration and for any suitable number of teeth.