Fixed Gear Tri-Diamond Single Speed Bicycle Freewheel 14t/16t/18t/20t, Bicycle Freewheel (20t)Fixed Gear Tri-Diamond Single Speed Bicycle Freewheel 14t/16t/18t/20t, Bicycle Freewheel (20t)Features of Fixed Gear Tri-Diamond Single Speed Bicycle Freewheel 14t/16t/18t/20t, Bicycle Freewheel (20t) Single speed Bicycle Freewheel 14T/16T/18T/20T | Cold f..