Bottom bracket ELVEDES PRESS FIT top-of-the-range BB86/92 for SHIMANO with posite cups for greater rigidity, combined with top-of-the-range 2RS stainless steel ring bearings enriched with Mobil Waterproof grease. Convertible to GXP 22 mm with gearbox kit REF 2018080 Convertible to FSA MEGA EXO 19 mm with kit REF 2019065 Convertible to FSA MEGA EXO 24 mm with kit REF 2018084Features :41mm diameterCase width 86-92mmShaft diameter 24 mm for SHIMANO or other options 22, 24 or 19 mm with conversion kitCase replacement bearings: 2019087GXP replacement cups and SHIMANO : REF 2018082FSA 19mm MEGA EXO: REF 2019065FSA MEGA EXO 24mm: REF 2018084Very high quality Elvedes !!!