US Patent 7740262 Easy riding bicycle

A bicycle frame may include handlebars having a rise and range of handlebar angle adjustment and a seat tube mounted at an angle a fixed distance rearward of the bottom bracket. The combination of the handlebar rise, the fixed distance and seat tube angle, as well as the ranges of handlebar angle and saddle height adjustments, result in the handlebar angle and saddle height being sufficiently adjustable so that almost all riders can comfortably sit upright on the saddle using substantially the same leg extension to place a foot flat on the ground when stopped and while pedaling.