6KU Aluminum Fixed Gear Single-Speed Fixie Urban Track Bike, Crisp White, 55cm, Medium

"how to choose size? please select size according to height: small (52cm) / 5'4 ""- 5'8"" medium (55cm) / 5'8 ""- 5'11"" large(58cm) / 5'11 ""- 6'4"".Please reconfirm whether the size you purchased is correct before you pay.,How to assemble your 6KU bike? We have the assembly video available on this page or find it on YouTube. Tools included in the package.,Lightweight Full Aluminum Frame and Fork,30mm Deep V Double-Walled Alloy Wheels,Ride Fixed Gear or Freewheel with a Flip-Flop Hub, Including front and rear brakes, Suitable for commuters