Shimano bb94 mtb press fit bottom bracketthe ideal bottom bracket for shimano hollowtech mountain bike mtb cranks, the press fit bottom bracket benefits from sealed polymer reinforced cups that ensure a quieter cycling experience and help prevent damage to your frame.featuresset includes left and right hand cups, 2.5mm spacer, inner cover, and inner o ringseasy press fit installationaxle length 24mmbottom bracket type bb86 bb92 bb121bottom bracket shimanocompatibility compatible with 89.5mm with 2.5mm spacer and 92mm shellscup diameter 41mmweight 58gpart no sm bb94 41a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.