Another manufacturing masterpiece from Wheels Manufacturing These high quality machine shells with Stainless bearings enable you to pedal faster for longer External bottom bracket shells Machined aluminiumcups contain pre-installed high-grade 5 stainless steel bearings, allowing the cranks to spin more freely Fits both Shimano & Race Face systems Laser etching on the casing denotes br&, & installation direction Replacement seals & bearingsavailable for quick in-store bottom bracket servicing British Standard Threads Weight: 95 grams