Velo Orange Grand Cru Cartridge BB 113mm Threadless Chromoly spindle, sealed cartridge bearings English and French models use Shimano-spline installation tool; threadlessuse standard bottom bracket spanner and pin spanner Threadless version work well in English, French, Swiss shells as well as bottom bracket shells with damaged threads with no facing required (does not work in Italian shells) Threadless versions expand to tighten into the bottom bracket shell without damaging threads; once removed the original threads can be reused Spindle Interface Type: Square Taper JIS