... 1.2mm 4)Size:26",28" gear bicycle:1) Item: 700C fixed gear bike, single speed road bike, track ... frame 3) Handle bar: bullhorn type bar for fixed gear bike, alloy 4) Stem: alloy stem 5) ... . parts 7) Hub: flip-flop hub, with fixed gear 16T and freewheel 8) Crank: alloy crank, 5 ... specialized in steel/hi-ten bicycle and parts ,kid’s bicycle and gear bicycle , such as bicycle frame, front fork, handlebar ...