Road- Junior Racing Bicycle Chain Wheel & Crank Sets

We are offering road- junior racing bicycle chain wheel & crank sets. Model fr3722a1 chainring 46t 34t (910's) outer ring alloy sb bk anodized cnc center ring na inner ring steel ed, or painted ring fixation interchangeable arm finish sand blasted silver or bk anodized crank material 6061 alloy forged length 170, 165, 155, 140mm bcd 110mm chainguard optional axle fixing bolt cro-mo (m8) chainline 43.5mm weight 690g suggested spindle 110.5mm square ● taiwan● china isis ● taiwan ○china