Abstract: The present invention provides a leaning vehicle comprising a leaning frame (1), a front suspension assembly (2), an undercarriage element (3), a rear suspension assembly (4) and a motor (10), wherein the leaning frame (1) comprises a straddle seat (5) and a hand steering element (6), the hand steering element operatively connected to the front suspension assembly (2); the undercarriage element comprises a front section (7) and a rear section (8), and is connected to a suspension connecting element (9); the front suspension assembly (2) comprises two ground engaging members (13) and at least one shock absorber (20), and is connected to the leaning frame (1) and the suspension connecting element, such that the ground engaging members (13) of the front suspension assembly will tilt in the same direction as the leaning frame; the rear suspension assembly (4) comprises at least one rear ground engaging member (23) and is connected to the rear section (8) of the undercarriage element; wherein the leaning frame (1)

Abstract: A foldable personal such as a tricycle which can be convertible into a stroller, is configured for accommodating a child therein and for preventing, when desired, the child from being able to steer the vehicle, vehicle having an operational state and a storage state, in which it can take an extremely compact form. The vehicle has a longitudinal axis lying in its vertical plane of symmetry and having a horizontal reference plane perpendicular to the plane of symmetry, and it takes its compact form in the storage state both in the direction along its longitudinal axis and in the directions perpendicular to this axis both along the plane of symmetry and perpendicular to the plane of symmetry.

Abstract: A tricycle is provided having a front frame assembly, a rear frame assembly pivotally connected to the front frame assembly, and a release assembly connected to both the front frame assembly and the rear frame assembly to secure the rear frame assembly to the front frame assembly in a use position and alternately in a storage position. The release assembly is moveable to allow for transitioning the rear frame assembly to the storage position from the use position. A foot rest is connected to the tricycle and is also moveable between a use position and a storage position. The tricycle also has a restraint hoop and a canopy, and quick release mechanisms to removably secure the restraint hoop and the canopy to the tricycle.

Abstract: In an aspect a vehicle is provided, and includes a frame a front wheel and a rear assembly. The front wheel is rotatably mounted to the frame. The rear assembly includes a first rear wheel support and a second rear wheel support. Each of the wheel supports is movably mounted to the frame. The rear assembly further includes a first rear wheel and a second rear wheel. The first and second rear wheels are rotatably mounted to the first rear wheel supports respectively. The rear assembly is positionable in a first position in which the first and second rear wheels are substantially immediately adjacent one another to operate as a single rear wheel, and a second position in which the first and second rear wheels are spaced apart from one another.

Abstract: A frame of a vehicle includes a front fork unit pivotably connected to a head tube of a vehicle body mechanism, a crank axle disposed on the front fork unit for two front-wheel cranks to be pivoted thereon. Two front wheels are pivotably disposed on the cranks, respectively. A front-wheel counteracting mechanism is pivotably connected between each of the cranks and the front fork unit to transmit an impact force to the cranks so as to cause opposite upward and downward movements of the front wheels to thereby keep the front wheels in contact with the ground and to render movement of the vehicle steady and safe.

Abstract: A structure of rocking controller of a saddle riding type vehicle includes a rocking lock mechanism configured to lock lateral rocking of the vehicle body; wherein the rocking lock mechanism includes an arc shaped lock plate which crosses with an axial direction of a rocking shaft of the vehicle body and a lock caliper configured to lock a relative rocking between the lock plate and the lock caliper by clamping the lock plate, and a motor for the actuator is arranged in front of the rocking lock mechanism and the rotating drive shaft of the motor is arranged so as to penetrate an inner circumferential region of the arc shaped lock plate.

Abstract: A vehicle in which traveling can be stabilized and the risk of overturning can be reduced, a vehicle with a pair of first suspension arms, a pair of second suspension arms connected to the pair of first suspension arms via a pair of joints, a pair of shock absorbers for connecting the pair of first suspension arms and pair of second suspension arms, a pair of forks as to allow turning about a steering axis with respect to the pair of second suspension arms, a pair of front wheels arranged on the pair of forks, a vehicle body to which the pair of front wheels are included, and a leaning part for leaning the vehicle body. The tread width increases as the vehicle body is leaned by the leaning part.

Abstract: In a vehicle, a portion of an upper cross member and a portion of a lower cross member at least temporarily overlap each other without coming into contact with each other when a body frame of the vehicle is caused to lean from an upright state to the left or the right with a maximum angle, as viewed from a front in a direction along a lower intermediate connecting axis.

Abstract: A vehicle includes a restrictor that prevents movement of a brake controlling operation transmission member and is provided at an upper portion of at least one of an upper cross portion, a right side portion, and a left side portion. The brake controlling operation transmission member includes a leaning-associated deforming portion that is located between a brake controller and the restrictor to deform in response to the leaning of a body frame and a wheel-turning-associated deforming portion at least a portion of which is located between the leaning-associated deforming portion and a brake device to deform in response to the turning of a right front wheel and a left front wheel.

Abstract: A drive system for a pool cleaner is disclosed, the drive system including a motor operatively connected relative to an axle for driving rotation of the axle. The axel in turn is connected to and drives the rotation of (i) a roller assembly including a roller for cleaning a target surface and (ii) a wheel drive assembly engaged with an idler gear for driving a wheel. Notably the axis of rotation of the roller assembly is different than the axis of rotation of the wheel. Thus, the wheel drive assembly may drive the wheel by interacting with a surface of a cylindrical flange of the wheel.

Abstract: A kit for an electric cycle includes a powertrain module including a case, a battery disposed in the case, an electric motor in communication with the battery and disposed in the case, and a connecting port on the case. The kit includes a first module including a frame member configured to releasably engage the connecting port and a wheel rotatably connected to the frame member, a second module including a frame member configured to releasably engage the connecting port, and a releasable locking feature on the connecting port.

Abstract: A tricycle with foldable double wheel assembly comprises: a frame, a single-wheel assembly and a double-wheel assembly respectively disposed at front end and rear end of the frame, and a handlebar assembly matching with the single-wheel assembly to control steering, the double-wheel assembly comprising a supporting beam and two wheels disposed on the supporting beam, wherein the supporting beam comprises two branches of same structures, the two wheels being respectively disposed on the two branches, the supporting beam having a first stable state where the two branches are open, and a second stable state where the two branches are put together side by side. The supporting beam in the double-wheel assembly of the present utility model is foldable so that it is not necessary to occupy a relatively large space to carry/store the tricycle and the usage convenience of the tricycle is thus improved.

Abstract: A method and apparatus relating to a driveline and suspension system for a vehicle and, more particularly, methods and systems for driveline-suspension coupling in a narrow multi-track leaning vehicle with three or more wheels and with at least two driving wheels. There are provided graphical and computational methods for determining driveline and suspension geometries for narrow multi-track vehicles, as well as apparatuses including the geometric configurations, and exhibiting improved driveline-suspension coupling behaviors.

Abstract: A three wheeled scooter comprises a chassis having forward and aft ends with a front wheel non-pivotally mounted to the forward end and a pair of rear wheels coaxially mounted to the aft end. The chassis defines a longitudinal axis and includes a support assembly and a handle assembly extending upwardly from the support assembly. The rear wheels are configured to be angularly yawable relative to the longitudinal axis between a neutral position and a yawed position. Steering of the scooter is thereby effectuated by angular yawing of the rear wheels relative to the longitudinal axis such as by asymmetric loading of one of opposing sides of the support assembly.

Abstract: A recumbent vehicle is disclosed, which generally consists of a front, seat and rear chassis. The seat chassis is operatively connected to upper and lower pivot joints, which allow for the seat chassis, and thus the rider, to move independently from the remainder of the vehicle. The upper and lower pivot joints are each comprised of subcomponents such as spherical axial bearings along with a coil to create the independent movement, which manifests itself during turns and when hitting obstacles on the terrain. The rider can control the direction of the recumbent vehicle by using a steering arm.

Abstract: A tricycle has a frame, a front wheel with drive pedals, a seat, and a footboard. The footboard of the novel tricycle can optionally be mounted on the frame in a first orientation and at least a second orientation.

Abstract: A tricycle is provided for supporting multiple passengers. The multi-passenger tricycle has a frame member, a steering assembly, a rear axle assembly, an auxiliary handlebar and a rear passenger foot platform. The steering assembly is rotatable and is coupled to a first end of the frame member. The rear axle assembly is coupled to the second end of the frame member. The auxiliary handlebar is coupled to the frame member between the first end and the second end of the frame member. The rear passenger foot platform is coupled to the frame member adjacent a second end of the frame member, and is at least partially above the rear axle assembly. Preferably, the rear passenger foot platform includes a first foot platform on one side of the frame member and a second foot platform on an opposing side of the frame member.

Abstract: A foldable children's tricycle comprises a tricycle front, a link device and a positioning assembly. The tricycle can be folded by using the link device, which can save space and reduce transportation cost. In addition, an inserting rod of the positioning assembly can be engaged in first or second positioning grooves of the link device, so the tricycle can be fixed when expanding or folding, thus improving the structural strength of the tricycle.

Abstract: The preferred embodiments provide a frame for a one person three-wheeled human powered vehicle, the rear portion of which resembles an upright bicycle frame capable of supporting a fixed rear drive wheel substantially in alignment with the frame centerline. The frame has a left-side lateral extension and a right-side lateral extension, each of which includes a head tube at or near its outer end where front forks or steering posts can be secured. Each front fork or steering post can then hold one of two front steerable wheels. The frame is compatible with shock-absorbing suspension technology, which can be employed if desired.

Abstract: A cycle frame easily converted from a bicycle to a tricycle and vice versa, and to a cycle and a baby carriage using same. The cycle includes a main frame including a main support and a pair of sub-supports branching from the main support, a pair of conversion frames, front end portions thereof being hingeably connected to rear end portions of the sub-supports such that the distance between rear end portions thereof is adjustable, a pair of connection brackets respectively connected to the rear end portions of the conversion frames, a fork frame rotatably connected to the front end portion of the main support, a front wheel shaft rotatably connected to the fork frame, a main rear wheel shaft, both ends thereof being respectively and separably connected to the connection brackets, and a propelling pedal rotatably mounted on the main support and drive-connected to the main rear wheel shaft.

Abstract: A recumbent cycle includes a toothed belt drive system and rear suspension. It also includes a double A-arm suspension assembly and at least one transmission having a planetary gear arrangement.

Abstract: A vehicle includes a seating platform featuring a first pair of seat mounting holes, a second pair of seat mounting holes positioned rearward of the first pair of seat mounting holes and a third pair of seat mounting holes positioned rearward of the second pair of seat mounting holes. A seatback is provided with a pair of hooks and a pair of snaps. Each of the snaps includes a catch portion. The hooks and snaps are adapted to engage the first and second pair of seat mounting holes to secure the seatback in a first position. The hooks and snaps are also adapted to engage the second and third pair of seat mounting holes to secure the seatback in a second position.

Abstract: A bicycle component controlling includes at least a first sensor and a controller. The first sensor detects a first operating condition, whether a rider is sitting on a bicycle seat. A second sensor is provided that detects a second operating condition. The sensors output signals indicative of the respective operating conditions. The controller is operatively connected to at least the first sensor and possibly the second sensor. The controller is configured to generate a component control command to control a bicycle component based on at least the first signal and the possibly the second signal. The bicycle component is a component other than an automatic transmission and a suspension when the second sensor is not provided. If the second sensor is provided, a suspension and automatic transmission is controlled, or components other than an automatic transmission and a suspension is controlled.

Abstract: A stabilizing device for a handcycle has an axle including an inner shaft and an outer shaft. A first stabilizing component is coupled to the inner shaft. A second stabilizing component is coupled to the outer shaft in proximity to the first stabilizing component. A locking component is configured to engage the first and second stabilizing components to reversibly reduce rotation of the inner shaft with respect to the outer shaft. Alternatively, a stabilizing device for a handcycle has a frame including first and second stabilizing members affixed to the frame. A locking member is configured to engage the first and second stabilizing members to stabilize the frame. The stabilizing components or members include receptacles, teeth, or a friction component. The locking component or member includes a pin or knob configured to adjust the first or second stabilizing member into a locked position.

Abstract: A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.

Abstract: One embodiment of a tricycle having a spine frame, supported by a rear wheel and a pair of steerable front wheels, and supporting a recumbent seat pivotably attached at its rear. A pedal boom extends forwardly of the spine and supports a pedal crank assembly. The front wheels each support a lateral arm with the front wheel pivotably attached at the distal end and an angular projection attached at the proximal end. A pivot connects each angular projection to the spine, allowing the lateral arms and attached front wheels to fold to a stowed position alongside the spine. Another pivot connects the boom to the spine, allowing the boom to fold back to a stowed position against the spine. In the travel position, a clamp arrests the angular projections, and can arrest the boom and seat. The tricycle is collapsible to several levels of compactness.

Abstract: A vehicle with front and rear steering is disclosed. The vehicle can be a cycle. The cycle includes a front wheel steered by a front hand-steering mechanism, and two back wheels steered by a back hand-steering mechanism. The back wheels are dual inclined casters with full rotational movement. A drive train forward of the front wheel drives the front wheel, while a rider is inclined in a seat in a recumbent orientation. The front and rear steering provides unlimited maneuverability and turning capabilities.

Abstract: The present invention features a low-rider tricycle kit for converting a standard bicycle to a low-rider tricycle. The kit contains a low-rider tricycle frame, a low-rider tricycle front fork assembly, a low-rider tricycle handlebar having a first grip and a second grip, a low-rider tricycle seat, and a low-rider tricycle front fender for substituting with a standard bicycle frame. The kit further includes a low-rider tricycle headlight assembly, a low-rider tricycle tail light assembly, a low-rider tricycle mirror, a double-rear-wheel axle assembly, a storage cavity, and a storage cart that attaches to and sets into the storage cavity of the double-rear-wheel axle assembly.

Abstract: An unmotorized sand-rideable bicycle utilizes oversized balloon tires that have an enlarged footprint to permit the bicycle to ride up over even loose sand to provide ease of pedaling as well as enhanced steering and stability over that associated with standard bicycles.

Abstract: Various embodiments of a multi-person tricycle are disclosed. In at least one embodiment, the multi-person tricycle includes two front drive wheel assemblies, each having an independent drive train assembly, and includes a rear wheel assembly operably connected to a steering mechanism which may be simultaneously or independently operated by one or more riders. In at least one embodiment, the multi-person tricycle may be configured or designed to enable two front riders to sit side-by-side, and further may be configured or designed to enable each rider to independently exert and/or vary his or her own pedaling force and/or pedaling cadence without substantially affecting steering of the vehicle.

Abstract: This invention relates to a foldable vehicle comprising at least three wheels which of one wheel is a steering wheel, a steering handle, a frame connected with the steering element and having at least one standing surface. Upon folding the frame will be movable with respect to the steering handle to statically fit together in a compact manner Hereby a practical and efficient vehicle for personal transportation and commuting is created.

Abstract: A drive device and a drive control method for the electric bicycle are disclosed. The drive device of the electric bicycle is equipped with a power supply/storage unit, a compact motor, an inclination sensor, a brake actuation sensor, a pedal-rotating speed sensor and a drive control module. The drive device performs integrated calculations using the inclination information of the inclination sensor, the brake actuation information of the brake actuation sensor and the pedal-rotating speed information of the pedal-rotating speed sensor, so the drive control modules instructs the compact motor and the power supply/storage unit to quickly enter an auxiliary drive mode for rotating wheels of the electric bicycle, or to enter an energy recovery mode for storing electrical energy generated by the compact motor.

Abstract: A riding toy provides a spin-out feature. The riding toy includes a frame, a steerable front wheel mounted to the frame and a rear wheel mounted to the frame. A rear carriage is pivotally attached to the frame so as to pivot about a generally horizontal axis. A caster is mounted to the rear carriage so as to pivot about a generally vertical axis. A lever is pivotally attached to the frame. A link has a leading end pivotally connected to the lever and a trailing end pivotally connected to the rear carriage. As a result, the riding toy may be changed from a traditional configuration, where the rear wheel of the riding toy contacts a riding surface upon which the riding toy is being ridden, to a spin-out configuration, where the caster lifts the rear wheel of the riding toy off of the riding surface, by pulling the lever.

Abstract: A wheel suspension system for a three-wheeled motorcycle or “trike” includes parallel wheels mounted on vertically pivoting suspension arms governed by hydraulic pistons. The pistons have upper liquid reservoirs that are interconnected through a valve system, which interconnects the upper reservoirs when the trike is in motion, allowing opposing vertical wheel movements when banking through turns, and prevents liquid exchange when the trike is stopped, thereby holding the motorcycle upright, Embodiments include a manual and/or automatic valve control. A threshold switching speed for an automatic controller can be factory set and/or user adjustable. The pistons can include directly interconnected lower fluid reservoirs. A shock-absorbing reservoir can allow transient vertical movement of both wheels to absorb shocks. A cover system can emulate the appearance of saddle bags and can appear to be covering only a single wheel.

Abstract: A child vehicle includes a front frame having a handlebar and at least one front wheel, and a rear frame movably coupled thereto and having at least one rear wheel. At least one graphical interface is coupled to the vehicle and includes a placard having a frame secured to the vehicle and a working surface disposed generally within the frame. The working surface is configured to be marked thereon by the child using a marking utensil so as to create an artistic expression for customizing the vehicle. A tool-less coupling between the front and rear frames and an associated method of a tool-less assembly of a child vehicle are also disclosed.

Abstract: A three-wheel pedal-style wheelchair which includes a roller at a side, close to the ground, of the wheelchair, wherein the roller prevents the wheelchair from turning over, a steering wheel arranged at a side of the wheelchair, and two front wheels respectively arranged at two opposite sides of the wheelchair, wherein the two front wheels comprises a driving wheel led to rotate forward or backward by a user stepping and a loose wheel, wherein when the wheelchair turns to a direction in a small radius, the steering wheel is considerably rotated to a direction and the driving wheel is rotated forward, wherein when the wheelchair turns to another direction, the steering wheel is considerably rotated to a direction and the driving wheel is rotated backward. Accordingly, the wheelchair is easily controlled to have a small turn, like whirling in one spot, to move and to turn safely.

Abstract: A movable vehicle includes a first frame member, a second frame member, and a biasing mechanism. The first frame member includes a front wheel and a handlebar configured to turn the front wheel in various directions. The second frame member has at least one rear wheel and is coupled to the first frame member such that the first frame member can rotate with respect to the second frame member. The biasing mechanism is operatively coupled to the first and second frame members and biases the front wheel in a preferred direction, such as a straight direction. The biasing mechanism may include a resilient gasket and a cavity having at least partially corresponding polygonal cross sections.

Abstract: A toy vehicle is adaptable for use as a ride-on vehicle or a scooter, and includes a support frame provided with a user supporting mechanism and having a first portion and a second distal portion, and a grip handlebar for the user mechanically connected to the support frame. The support frame is mechanically connectible/disconnectible to/from the grip handlebar in order to assume first and second use configurations such that the grip handlebar is connected to the first and second portions, respectively, and such that the user support mechanism assumes different positions.

Abstract: A tandem tricycle having a front frame portion and a detachable rear frame portion, which is configured to accommodate two riders. A drivetrain allows the riders to independently power the tricycle. A full suspension assembly provides a smoother ride.

Abstract: Methods and apparatus for LC/IMS/MS analysis involve obtaining noisy raw data from a sample, convolving the data with an artifact-reducing filter, and locating, in retention-time, ion mobility, and mass-to-charge-ratio dimensions, one or more ion peaks of the convolved data.

Abstract: A combined seat with compression device for interactively actuating a sound effects unit incorporated into a ride on toy vehicle as a user bounces up and down on the combined seat with compression device. The toy includes a frame for a ride-on toy vehicle, a sound effects unit having a housing secured to the frame, a seat secured to the frame and movable between first and second positions, an actuating mechanism attached at the seat for engagement with the sound effects unit, and a deformable compression device positioned at the seat capable of depressing as the seat is moved from the first the position to the second position to interactively activate the sound effects unit.

Abstract: A pivot mechanism includes a base member configured to be coupled to a first element and a generally cylindrical rotating member configured to be coupled to a second element. An elongate pin extends through the base member and rotating member and defines a pivot axis. The rotating member is capable of rotating relative to the base member about the pivot axis. The elongate pin is movable in a direction generally parallel to the pivot axis between a secured position and a release position. In the secured position, the rotating member is prevented from rotating relative to the base member, and in the release position, the rotating member is permitted to rotate relative to the base member. The pivot mechanism may be incorporated into a scooter or a tricycle to provide different configurations thereof.

Abstract: A bicycle frame is provided comprising: two substantially concentric rings connected along a front portion and flared out at a rear portion to enable a rear bicycle wheel to fit there between, the two substantially concentric rings enabled to absorb strain energy received from at least one of the rear wheel and weight from a rider; a seat post for receiving a bicycle seat, the seat post extending from a top portion of the two substantially concentric rings; a rear wheel bracket extending from a bottom rear portion of each of the two substantially concentric rings for supporting the rear wheel between the two substantially concentric rings; a bottom bracket located proximal a bottom front portion of the two substantially concentric rings, the bottom bracket for connecting at least a crank to the bicycle frame; a headtube for receiving a front fork; and, at least one support for the headtube to connect the headtube to the two substantially concentric rings.

Abstract: A personal transportation device comprises a riding platform supported by one or more wheels, a steering mechanism at least partially embedded in the riding platform and a drive wheel assembly. A first wheel may be steerable while a second wheel is a slave wheel. The steering mechanism may be foot-operated. The drive wheel may be hand-propelled and non-steerable. The drive wheel is operatively connected to a drive sprocket and chain and is coupled to the riding platform by a platform frame. The personal transportation device may comprise one or more track arm assemblies coupled to the drive wheel assembly such that movement of the track arm assemblies operates the drive wheel assembly and rotates a drive wheel to propel the vehicle.

Abstract: An unmotorized sand-rideable bicycle utilizes oversized balloon tires that have an enlarged footprint to permit the bicycle to ride up over even loose sand to provide ease of pedaling as well as enhanced steering and stability over that associated with standard bicycles.

Abstract: One embodiment of a tricycle (20) having a spine frame (22), supported by a rear wheel (34) and a pair of steerable front wheels (36), and supporting a recumbent seat (42) pivotably attached at its rear. A pedal boom (44) extends forwardly of the spine (26) and supports a pedal crank assembly (46). The front wheels each support a lateral arm (28) with the front wheel pivotably attached at the distal end and an angular projection (80) attached at the proximal end. A pivot (78) connects each angular projection to the spine, allowing the lateral arms and attached front wheels to fold to a stowed position alongside the spine. Another pivot (84) connects the boom to the spine, allowing the boom fold back to a stowed position against the spine. In the travel position, a clamp arrests the angular projections, and can arrest the boom and seat. The tricycle is collapsible to several levels of compactness. Other embodiments are described and shown.

Abstract: A vehicle powered by an operator's arms and/or legs utilizes a pivot column for propulsion. An upper propulsion member (handlebar) is provided on the upper end of the pivot column. A lower propulsion member (foot bar) is provided on the lower end of the pivot column. A drive propulsion system is provided between the pivot column bottom and a rotational drive gear set. The drive propulsion system engaged with said at least one rotational drive gear, the propulsion system engages with and provides propulsion to an upper portion of the rotational drive gear during a counterclockwise motion of the pivot column and engages with and provides propulsion to a lower portion of the rotational drive gear during a clockwise motion of the pivot column. The rotational drive gear spins freely when subjected to the reverse motion. Incorporating two gears with opposing propulsion drives provides forward motion throughout the entire reciprocating stroke of the pivot column.

Abstract: A child's riding vehicle such as a tricycle has a secondary steering column through which the parent walking behind the tricycle may steer the tricycle. The secondary steering column is coupled to the first steering column by a pair of rods that are attached at their respective ends to a first flange around the primary steering column and a second flange around the secondary steering column. The steering rods also act as steering limiters by contacting the wheel fork tube at a predetermined maximum steering angle and resisting further rotation of the flange. The mechanism lies entirely within the hollow frame of the tricycle for safety. The child's steering handle can be disengaged from the fork tube to allow the parent to completely control the steering without interference from the child.

Abstract: A bicycle including a front wheel, a rear wheel, and a frame supported on the front and rear wheels, the frame having a frame member. The bicycle further includes a first fairing member protruding outward from the frame member and having a side surface defining an aerodynamic trailing edge and a second fairing member detachably mounted on the first fairing member such that the side surface is exposed.

Abstract: A children's tricycle comprises a frame, a set of handlebars, a fork, three wheels and a seat adaptable for users of different sizes without modification. The frame comprises a top tube, a head tube and a rear triangle that is substantially perpendicular to the top tube. In some embodiments, the seat extends from the head tube to a point on the frame. In some embodiments, the seat extends from a pivot point of the tricycle along the top tube to the rear triangle. Accordingly, to utilize the tricycle, different sized users are able to move forward or backward on the seat to comfortably engage the pedals and handlebars of the tricycle. In some embodiments, the frame of the children's tricycle comprises one or more of steel, aluminum and metal composite.