This Tandem bicycle design describes a reduced linear dimension, whereby the inherent polar integrity of the tandem structure is reduced.

Due to the close proximity of the cyclist, balance and coordination is more rapid and spontaneous.

The gear construct is comprised of a system of three cranking sprockets, closely arranged in a forward (one) and rearward pair. The forward and rear gears closest to the bicycle frame; coupled to a timing chain, functions as the timing mechanism. The rearward outer gear functions as the driving gear connected by a power chain to the rear wheel sprocket(s).

The handlebars required by the rear cyclist necessitates an innovative base connected to the bicycle frame located behind the front cyclist seat collar.

A locking mechanism on the handlebar coupler allows deployment of handlebars from retracted, to the riding position.

A snowmobile assembly including a chassis and suspension system. The suspension system configured to allow a selected suspension travel. The snowmobile further including a cooling system assembly.

A snowmobile assembly including a chassis and suspension system. The suspension system configured to allow a selected suspension travel. The snowmobile further including a cooling system assembly.

An assisted and multifunctional ergonomic tricycle-type device for exercise, therapy, sports, recreation and alternative transportation for adults with or without disabilities, having a 4-piece chassis where part (1) is joined to part (2) by double equalizable hinge and the central part is “7” shaped, in the upper part of part (2) an adjustable front seat is installed, a cell phone holder and a Bluetooth speaker, and in the upper rear part of part (2) there is an equalizable arm extension housing an axle support of traction with hands and parts (2) and (3) of the chassis are joined to a support of an axle and a central shock absorber of the chassis and where part (2) also has supports on the front side of the drive axle with the feet and an adjustable support of an adjustable rear seat is installed on the upper rear part of part (3).

An adjustable bicycle stand includes a pair of forward and rearward base members and a pair of right and left upright members supporting a bicycle wheel therebetween. Each upright member extends between both the forward and rearward base members. At least one of the upright members is adjustable relative to the forward and rearward base members.

An adjustable bicycle stand includes a pair of forward and rearward base members and a pair of right and left upright members supporting a bicycle wheel therebetween. Each upright member extends between both the forward and rearward base members. At least one of the upright members is adjustable relative to the forward and rearward base members.

An adjustable bicycle stand includes a pair of forward and rearward base members and a pair of right and left upright members supporting a bicycle wheel therebetween. Each upright member extends between both the forward and rearward base members. At least one of the upright members is adjustable relative to the forward and rearward base members.

A snowmobile assembly including a chassis and suspension system. The suspension system configured to allow a selected suspension travel. The snowmobile further including a cooling system assembly.

The described bicycle has a frame made of a composite material and defining a monocoque shell which is monolithic, entirely formed of the composite material, and includes: a rear upper portion, a head tube portion, and a rear mounting portion; and first and second side panels each extending between, and integrally formed with, at least the head tube portion at a forward end and the rear upper portion and the rear mounting portion at a rearward end. The first and second side panels are integrally interconnected along their respective top and bottom edges to form a substantially hollow shell structure at least partially enclosing a shell cavity defined between the laterally spaced apart first and second side panels. The hollow shell structure defines a rear opening between the rear upper portion and the rear mounting portion that communicates with the shell cavity.

The present invention provides an internal three-speed dual-clutch transmission, comprising a housing module, an intermediate shaft module, a planetary gear module, a driver module, a main clutch module, an auxiliary clutch module, a jack cage module and an outer gear ring module. The housing module comprises a housing, a brake adapter and a housing adapter and is configured as an output end; the intermediate shaft module comprises an intermediate shaft, a push rod, a steel ball track nut and a frame locking nut. The planetary gear module comprises at least one planetary gear, a planetary gear cage, at least one planetary gear cage pin shaft and at least one planetary gear cage jack. The push rod serves as a speed-changing push rod, the auxiliary clutch module acts as a clutch switch, and the main clutch module has the function of the clutch switch and transferring torque.