The xtr hollowtech ii m9020 trail crank set from shimano are the ideal cranks for riders who want additional strength for the abuse of aggressive trails and enduro racing these 11 speed cranks are cold forged and designed for bikes using a 534 chain line for 148mm old 275 bikes the cranks are made from duralumin with an anodized finish and use the integrated bottom bracket system that fits together to make your crank set into a strong rigid and lightweight unit by not being sold with