HASA Folding Foldable Bike Shimano 6 Speed Aluminum Alloy 6061 Frame 20" Alloy Wheels Shimano 6 Speed Shifter This model is one size fits all. Fit riders 4'8" to 6'3" in height. The seat post is whopping 550mm long to accomodate all sizes. We recommend that a rider's weight be under 240 lbs.