Check the listing for details. ROTOR Track BSA Threaded Bottom Bracket. 24 MM. Color: Silver, Condition: New. Listed at 105.00 USD. ROTOR Track BSA Threaded Bottom Bracket. 24 MMThe ROTOR Track Threaded Bottom Bracket is designed specifically for ROTOR track cranks, including the SRM ROTOR Track Power Meter. The ROTOR Track BB consists of two external, ultra-stiff cups with high quality steel bearings.For use with English Thread (BSA) track frames. CompatibilityShell: Compatible with BSA (English) threaded track frames24 MM Compatible cranksets: 3D24 Track, SRM ROTOR Track Power Meter SpecsType: English (BSA) ThreadedAxle Size: 24/30 mmBearing type: SteelWeight: 108 grams*A ROTOR 30 MM Spacer Kit (sold separately) is needed when using the BSA 30 MM bottom bracket with the ROTOR 2INpower Track Power Meter. Why Buy from Power Meter City1. We ship fast! All orders ship on the same day your order is placed!2. Free shipping on all orders in the U.S.3. We are an authorized ROTOR dealer and this product comes with a full warranty.4. Expert advice and customer service in case you need any help.5. We offer a free, 30-day return policy on new items. About our CompanyAt Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service. We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.