Patent ID: 8186698

Claim:
A tricycle, comprising: a) a frame; b) a front wheel coupled to the frame and including a front rim and a front tire coupled about the front rim; c) a first rear wheel coupled to the frame, wherein the first rear wheel includes a first rear rim and a first rear tire, wherein the first rear tire is wider than the front tire; d) a second rear wheel coupled to the frame, wherein the second rear wheel includes a second rear rim and a second rear tire, wherein the second rear tire is wider than the front tire; e) a front suspension system functionally coupled between the frame and the front wheel; f) a rear suspension system functionally coupled between the frame and the first and second rear wheels; g) a drive system coupled to the frame and including a wheel hub, a rear axle, and a transmission system disposed substantially between the first rear wheel and the second rear wheel; wherein the drive system includes a first drive train configured to rotate the transmission system; wherein the drive system further includes a second drive train in communication with the first drive train and configured to rotate the rear right wheel during operation in a single rear wheel drive; and h) a locking device configured to lock the relative position of the wheel hub and the rear axle, wherein the locking device is selectably adjustably between a first mode and a second mode, wherein in the first mode the wheel hub and the rear axle are locked together, thereby rotating the right rear wheel and the left rear wheel simultaneously; and wherein in the second mode the wheel hub and the rear axle are independently rotatable, thereby rotating the right rear wheel and the left rear wheel independently of each other.