A frame assembly for a two-wheel vehicle includes a front wheel fork and chainstays. Between the front wheel fork and the chainstays, the frame assembly further includes a saddle tube, a crank housing, and a lower tube connecting the crank housing to a steering tube. A parallelogram-shaped suspension...http://www.google.ca/patents/US6910702?utm_source=gb-gplus-sharePatent US6910702 - All-suspension bicycle frame with isolated drive gear
