Heritage Twin CranksetClassic style Double crankset, with modern performance.Forged alloy square type crank armswith full CNC finish.172.5mm.BCD:130.53/39T 7075 CNC alloy shifting type chain rings.Hi polished and silver anodied finish.Classic Square BB type (Chainline: 43.5mm).Recommended chain: 9sp (or 8Spd).Recommended Chainline: 43.5mm:Recommended BB axle: JIS 118mmNote- For those looking for a compact gearing we also offer the Clubman Chainset (CKGECL7S) that comes in a 110bcd - 50/34 chainring option.