BSA-MTB-24 for Rotor 24mm cranks cranktype-M30 this cage is built with

this cage is built with shifting accuracy and chain retention in mind

Choose road bearings for lowest friction on road bikes or cross bearings if durability is key (that's for you

or powering through long training rides

Adding Kogel's titanium derailleur pulley bolts for Eagle derailleurs is a great way to better secure pulleys to your cage

This is the most common tool for older Shimano bottom brackets

BSA-MTB-24 for Rotor 24mm cranks cranktype-M30 this cage is built withThis bottom bracket fits a Rotor crank with 24mm on a classic BSA threaded mountain bike frame. This BB comes with Cross Seals. For installation, use a 16 notch tool with an internal diameter of 42. 7mm (measured at the inside of the notches). This is your most traditional tool for BSA bottom brackets, previously used by Sram GXP, Chris King, Campagnolo and older style Shimano. Example: Park tool BBT9 or BBT 69. 4