fixed gear bike aluminum 1)MICHE component 2)NECO headsets 3)Chromoly steel 4130/ alloy frame 4)KT HUBS fixed bicycle 2013 Colorful Fixed bike MICHE components fixed gear bicycle wholesale Specification: Frame: 4130 CHROMOLY STEEL/ 6061 alloy frameSize: 48/52/54/56/59cmHeadset: NECO H845CW, Ø28.6x34x38mm 9PCS WITH 2861, smoothFork: Chromoly steel, 700C*OD28.6*30Stem: alloy, forged, 4 bolts, 15'* ...