Adapter cups and bearings for the BB30 bottom bracket shell - to allow the use of standard non-BB30 cranks. To fit road frames width 68mm shells, compatible with Shimano 24mm cranks and KCNC K-type cranks (without insert). Full stainless steel bearings.
BB shell insertion diameter: 42mm (BB30 spec - ø42mm x 68 or 73mm), Bearing inner diameter 25mm, 24mm (with shim)