Abstract: A cogset with a plurality of sprockets has a subset of the sprockets connected together in a monolithic subset that is mounted directly in engagement with a coupling profile on the radially peripheral surface of a sprocket in the monolithic subset. The direct shape coupling between the sprocket of the monolithic subset and the sprocket-carrying body makes it possible to have very high solidity and rigidity of coupling to ensure the maximum precision of actuation of the gearshift that uses the sub-assembly.

Abstract: A bicycle rear wheel sub-assembly having a sprocket-carrying body, a cogset including a plurality of axially adjacent sprockets with at least three of the plurality of sprockets formed into a monolithic set and a ring nut securing the cogset to the sprocket-carrying body. The ring nut is formed as two parts assembled together—an axially outer first part on which a tubular body and a flange are formed, and an axially inner second part on which a threaded portion is formed. This structure provides a simple and effective coupling of the ring nut with the monolithic sub-set of the cogset and the sprocket-carrying body.

Abstract: A sub-assembly is presented, for a bicycle rear wheel, formed by a sprocket-carrying body and a cogset mounted coaxially on the sprocket-carrying body through shape engagement, is sized such that a good compromise is obtained between the ability to house a relatively large number of sprockets and the structural solidity of the sub-assembly.

Abstract: A bicycle rear wheel adapter has an annular body that abuts a sprocket-carrying body that extends in an axially outer direction and receives sprockets in radially peripheral positions. A coupling element on the annular body couples with the sprocket-carrying body so the adapter rotates as a unit with the sprocket-carrying body, and a sprocket-receiving seat on the annular body couples with a sprocket so the adapter rotates as a unit with the sprocket. The adapter is suitable for cogsets with small sprockets grouped in a monolithic grouping.

Abstract: A bicycle sprocket has a plurality of teeth arranged one after the other along a circumferential direction and a plurality of spaces each of which being arranged between two of said teeth. Said plurality of teeth includes at least one first gearshifting tooth and at least one second tooth arranged immediately downstream of said at least one first gearshifting tooth with reference to a rotation direction (R) of the sprocket during pedaling. Said plurality of spaces includes at least one first space defined between said at least one first gearshifting tooth and said at least one second tooth and having a predetermined circumferential extension and at least one second space arranged downstream of said at least one second tooth with reference to said rotation direction (R) and having a circumferential extension greater than that of said at least one first space.

Abstract: A cogset having a plurality of axially adjacent sprockets between a first sprocket with a minimum primitive circumference and a last sprocket with a maximum primitive circumference and the primitive circumferences are expressed as an integer dimensionless value equal to the ratio between the primitive circumference itself and a fixed length equal to a chain pitch. The difference in value between the primitive circumference of the sprocket next to a predetermined sprocket and the primitive circumference of the predetermined sprocket is defined as the jump associated with the predetermined sprocket. A first sprocket subset comprises the first sprocket and at least the next three sprockets and a second sprocket subset comprises at least three adjacent sprockets that do not include the first sprocket. The jump associated with all of the sprockets of the first subset is equal to 1, whereas the jump associated with the sprockets of the second subset increases by 1 from one sprocket to the next.

Abstract: A mounting body and a cassette suitable for mounting on a bicycle rear wheel hub in combination with the body. The body has an inner radial portion for coupling with rear wheel hub and an outer radial portion for mounting the cassette and a portion with a plurality of attachment areas for attachment to a cassette. The cassette has an axial centering opening for centering on the mounting body and a plurality of cassette attachment areas that align with the mounting body attachment areas to unite the mounting body and cassette for transmission of pedaling torque.

Abstract: A cassette adapted for mounting on a bicycle rear wheel hub and a by a mounting body for positioning the assembly on a bicycle rear wheel hub. The cassette has a plurality of adjacent sprockets fixedly connected to one another along an axis of the cassette. The cassette has an axial centering opening for centering on the mounting body without transmission of torque, and a plurality of attachment areas positioned a greater radial distance from the axis of the cassette than the radius of the centering opening for attachment to the mounting body.

Abstract: A bicycle rear wheel sub-assembly having a sprocket-carrying body, a cogset including a plurality of axially adjacent sprockets with at least three of the plurality of sprockets formed into a monolithic set and a ring nut securing the cogset to the sprocket-carrying body. The ring nut is formed as two parts assembled together—an axially outer first part on which a tubular body and a flange are formed, and an axially inner second part on which a threaded portion is formed. This structure provides a simple and effective coupling of the ring nut with the monolithic sub-set of the cogset and the sprocket-carrying body.

Abstract: A bicycle rear wheel adapter has an annular body that abuts a sprocket-carrying body that extends in an axially outer direction and receives sprockets in radially peripheral positions. A coupling element on the annular body couples with the sprocket-carrying body so the adapter rotates as a unit with the sprocket-carrying body, and a sprocket-receiving seat on the annular body couples with a sprocket so the adapter rotates as a unit with the sprocket. The adapter is suitable for cogsets with small sprockets grouped in a monolithic grouping.

Abstract: A cogset with a plurality of sprockets has a subset of the sprockets connected together in a monolithic subset that is mounted directly in engagement with a coupling profile on the radially peripheral surface of a sprocket in the monolithic subset. The direct shape coupling between the sprocket of the monolithic subset and the sprocket-carrying body makes it possible to have very high solidity and rigidity of coupling to ensure the maximum precision of actuation of the gearshift that uses the sub-assembly.

Abstract: This sub-assembly for a bicycle rear wheel, formed by a sprocket-carrying body (14) and a cogset (20) mounted coaxially on the sprocket-carrying body (14) through shape engagement, is sized so as to respect the condition: K=P1*P2 wherein P1=Ls/Lp and P2=Lc/(Sint+Sest). In this way, a good compromise is obtained between the ability to house a relatively large number of sprockets and the structural solidity of the sub-assembly.

Abstract: A bicycle gear having a first coating layer obtained by a plasma electrolytic oxidation treatment and a second coating layer, overlapped on the first coating layer, that is a lubricating substance, preferably a fluoropolymer.

Abstract: A bicycle crankset annular body with a toothed crown that extends about a rotation axis and has axially inner and outer surfaces and a reference plane (R) on which the rotation axis (O) and a longitudinal axis of a right crank arm lies. The annular body's maximum axial thickness, defined at a first angular portion, is between two parallel planes that are orthogonal to the reference plane (R). The angular portion has a lightening recess formed on the axially outer surface between two delimiting planes that pass through the rotation axis (O) and are inclined with respect to the reference plane (R) by first and second angles which are measured on axially outer surface moving angularly in the clockwise direction from the reference plane (R).

Abstract: A bicycle sprocket has a plurality of teeth arranged one after the other along a circumferential direction and a plurality of spaces each of which being arranged between two of said teeth. Said plurality of teeth includes at least one first gearshifting tooth and at least one second tooth arranged immediately downstream of said at least one first gearshifting tooth with reference to a rotation direction (R) of the sprocket during pedaling. Said plurality of spaces includes at least one first space defined between said at least one first gearshifting tooth and said at least one second tooth and having a predetermined circumferential extension and at least one second space arranged downstream of said at least one second tooth with reference to said rotation direction (R) and having a circumferential extension greater than that of said at least one first space.

Abstract: A cogset having a plurality of axially adjacent sprockets between a first sprocket with a minimum primitive circumference and a last sprocket with a maximum primitive circumference and the primitive circumferences are expressed as an integer dimensionless value equal to the ratio between the primitive circumference itself and a fixed length equal to a chain pitch. The difference in value between the primitive circumference of the sprocket next to a predetermined sprocket and the primitive circumference of the predetermined sprocket is defined as the jump associated with the predetermined sprocket. A first sprocket subset comprises the first sprocket and at least the next three sprockets and a second sprocket subset comprises at least three adjacent sprockets that do not include the first sprocket. The jump associated with all of the sprockets of the first subset is equal to 1, whereas the jump associated with the sprockets of the second subset increases by 1 from one sprocket to the next.

Abstract: A bicycle chain having an alternate succession of outer links and inner links connected to each other at respective end portions thereof. Each outer link and inner link comprises two respective plates arranged parallel to and spaced apart from one another to define a housing space for a tooth of a sprocket or toothed wheel. Each plate of each outer link has, at a central portion thereof, a first thickness. Each plate of each inner link has, at a central portion thereof, a second thickness. Each plate of each outer link and inner link has, at said respective end portions, a third thickness that is less than the sum of said first thickness and second thickness.

Abstract: A cassette adapted for mounting on a bicycle rear wheel hub and a by a mounting body for positioning the assembly on a bicycle rear wheel hub. The cassette has a plurality of adjacent sprockets fixedly connected to one another along an axis of the cassette. The cassette has an axial centering opening for centering on the mounting body without transmission of torque, and a plurality of attachment areas positioned a greater radial distance from the axis of the cassette than the radius of the centering opening for attachment to the mounting body.

Abstract: A mounting body and a cassette suitable for mounting on a bicycle rear wheel hub in combination with the body. The body has an inner radial portion for coupling with rear wheel hub and an outer radial portion for mounting the cassette and a portion with a plurality of attachment areas for attachment to a cassette. The cassette has an axial centering opening for centering on the mounting body and a plurality of cassette attachment areas that align with the mounting body attachment areas to unite the mounting body and cassette for transmission of pedaling torque.

Abstract: A bicycle crankset annular body with a toothed crown that extends about a rotation axis and has axially inner and outer surfaces and a reference plane (R) on which the rotation axis (O) and a longitudinal axis of a right crank arm lies. The annular body's maximum axial thickness, defined at a first angular portion, is between two parallel planes that are orthogonal to the reference plane (R). The angular portion has a lightening recess formed on the axially outer surface between two delimiting planes that pass through the rotation axis (O) and are inclined with respect to the reference plane (R) by first and second angles which are measured on axially outer surface moving angularly in the clockwise direction from the reference plane (R).