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The HollowTech II Chainset features hollow forged crank arms which are both lightweight and rigid whilst being incredibly strong and durable. HollowTech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durability.
SM-CRM70 chainring teeth (not included) are compatible and feature Shimano's new Dynamic Chain Engagement technology offering enhanced chain retention, driving rigidity and highly efficient. This crankset has a 50mm single ring chain line for use in conjunction with 135/142 mm O.L.D. We recommend that the bottom bracket is initially installed by a bike shop to ensure perfect facing and fit.
We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.
Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.