Wheels Manufacturing BBRight The Wheels Manufacturing BBRight Outboard bottom bracket gives you all of the same benefits as their usual outboard style BBs. The two machined aluminum cups thread together so the bottom bracket remains stable in the frame, which increases bearing life, simplifies maintenance, and guards against creaking. It allows for easy bearing replacement, too. This BB directly replaces all OEM BBRight bottom brackets. Note: Use only bottom bracket tools compatible with 16- notch Mego Evo BB's. (FSA Mega Evo and Park Tool BBT-29). Wheels Manufacturing Bbright Specifications: Made in the USA Bearings: Enduro ABEC-3 Bottom bracket/frame interface: BBRight Press Fit Bottom bracket shell width: 79mm Bottom bracket shell I. D. : 46mm Crank spindle type: Shimano Hollowtech II, FSA Mega Exo, Race Face EXI Crank spindle diameter: 24mm Shimano Manufacturer Part Number: BBRIGHT-OUT-1 SRAM Manufacturer Part Number: BBRIGHT-OUT-7 Weight: 98 grams | Wheels Manufacturing | Bbright Shimano Bottom Bracket With Abec-3