Wheels Manufacturing BSA MTB 73mm Bottom Bracket Treat your threaded bottom bracket shell right. Feed it a Wheels MFG BSA MTB 73mm Bottom Bracket. The CNC-machined aluminum shell provides precise bearing alignment and frame fit-no creaking here! Keeping the BB spinning is a set of replaceable Enduro cartridge bearings, for more miles and less worry. The SRAM bottom brackets are compatible with Tru Vativ/SRAM GXP cranks, while the Shimano option is compatible with Shimano Hollowtech II, FSA Mega Exo, or Race Face EXI cranks. Contact our Gear Advisors with questions. Ceramic Hybrid Bearing features:Grade 3 silicon nitride balls ground to . 00003 for unmatched smoothness and efficiency R-64 hardened, magnetite coated, polished, cryogenically treated 52100 alloy bearing races for long-term performance Silicone VV-type 2-lip non-contact labyrinth seals for excellent bearing protection with minimum friction Long-lasting Rheolube synthetic grease helps prevent contamination Nylon/graphite retainer to further minimize friction Wheels MFG BSA MTB 73mm Bottom Bracket Specifications:Made in the USABB shell width: 68mm, 73mm BB/frame interface: English Weight: 98 grams | Wheels Manufacturing | Bsa Mtb 73Mm Bottom Bracket | Black | Shimano, Abec-3 Bearings | Nylon