Patent ID: 6910702

Claim:
A frame assembly for a two-wheeled vehicle, comprising: a front wheel fork; a main frame attached to said front wheel fork, said main frame including chainstays; and a parallelogram-shaped suspension system attached to a rear end of said chainstays of said main frame, said parallelogram-shaped suspension system including: a rear fastening part attached to said rear end of said chainstays, said rear fastening part having a first pair of bearing bolts; a wheelholder for holding a rear wheel of the two-wheeled vehicle, said wheelholder having a second pair of bearing bolts; a first bar having a first end pivotably connected to a first one of said first pair of bearing bolts and having a second end pivotably connected to a first one of said second pair of bearing bolts; a second bar having a first end pivotably connected to a second one of said first pair of bearing bolts and having a second end pivotably connected to a second one of said second pair of bearing bolts, said first bar and said second bar having substantially equal lengths and being arranged substantially parallel, said first bar and said second bar being arranged so as to extend at a downward incline from said rear fastening part towards a rear of said frame assembly; a spring device between said rear fastening part and said wheelholder so as to extend downward toward an axle of the rear wheel to thereby generate a spring force; and a power transmission device for transmitting power from a first cogwheel mounted to said rear fastening part to a second cogwheel mounted to the rear wheel.