<!--ProdInc[170090041]/Mall:[rei_US]--> Compatible with ISO/English or BSA Threaded (1.37 in. x 24 tpi) bottom bracket/frame interfaces Compatible with the following road cranksets with a 24 mm spindle diameter: Shimano HollowTech II, FSA, RaceFace EXI/X-Type/MegaExo and Rotor 3D/Agilis Fits frames with a 68 mm shell width; 33.6 to 33.9 mm shell internal diameter Machined aluminum cups with replaceable bearings offer increased durability and longer bearing life Enduro Angular Contact sealed, grade 5 chromium-steel ball bearings provide smooth, long-lasting operation and are well-suited for carrying combined axial and radial loads 52100 high-carbon chromium alloy races are extremely tough and durable for a long life Includes one 2.5 mm aluminum bottom bracket cup spacer, two 0.5 mm and two 1 mmm crank spindle spacers, and 2 Enduro Silicon dust sealsMade in USA. Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Road Cycling</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Bottom Bracket Installation</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Threads into Frame</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Bottom Bracket Standard</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc4 <a href=''https://www.rei.com/product/221230/wheels-manufacturing-bsa-outboard-threaded-bottom-bracket-with-angular-contact-bearings-for-24-mm-road-crank-spindles'' target=_blank><img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170090041&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px'' border=0></a>