On A Roll The BSA bottom bracket uses reliable 6806 retainer bearings packed with waterproof grease along with wiper seals to keep the gunk out. Fit First And Foremost The CINCH compatible 30mm alloy cups for this bottom bracket are machined for a lasting and precise frame fit. Weather, Or Not All RF bottom brackets come with an inner plastic sleeve to keep the elements out and come with appropriate spacers to ensure a perfect fit. Can't Ride Without One A good bottom bracket works in the dark, does a job no one else wants to do and never gets the thanks it deserves. But if it wasn't there, all your fun would be over. So show our trusty 30mm BSA BB a little love would ya? Specs Shell Standard : BSA Bearing Style : Single Row Color : Black Spindle Diameter (MM) : 30 Weight : 87g Weight Conditions : BSA 73mm Shell Width (MM) : 68/73mm, 83mm, 100mm Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER