Hand made hi-ten steel 700c fixed gear single speed track frame, parallel top tube. Flip-flop rear wheel hub, no freewheel, only fixed gear , fixed gear cogs Taiwan, alloy seal bearing hub hollow axle. allows changing from fixed gear to single-speed. One pcs alloy crank arm, the crank center to center distance is 165mm, so when you riding fixed bicycle turn around, the pedals are not easy to touch the ground. Pedals with toe bandage.