40 Tooth Single Chainring Narrow Wide Teeth,BCD:104mm.shape:round.Diameter:168mm(40T)
Made of High quality Anodic oxidation 7075 T6 aluminium alloy,aerospace grade strength.Stiff 4mm plate thickness to ensure no flexing.
Light Weight:40T - -81.5g(0.18 lbs).With four chainring bolts. Fit For Single/double Crankset
Narrow Wide tooth design: ensures ultimate chain retention,increases wear life,and reduces friction and noise.
Suitable for most of SHIMANO,Raceface and SRAM cranksets. Please determine your crank BCD specification carefully before buying.