Narrow Wide Chainring 30T 38T for Bike with 104BCD Bolt Center Diameter
Weight: 39g(32t)/50g(34t)/62g(36t)/76g(38t). 4mm chainring thickness to for ensure no flexing. x Chainring. for Precision machining and anodic oxidation electroplating, keep for smooth, bright color, not faded and resistance.