Chris King bottom brackets utilize Fit Kits to ensure that cranks mate perfectly with our precision bearings, extend product life, and reduce the potential for noise. Fit Kits will also allow you to use one bottom bracket with a wide array of cranks, if you happen to change you cranks in the future. Fit Kit #3 (PBB083) for ThreadFitâ„¢ 30 with 30mm spindle cranksets. ~ For use with ThreadFitâ„¢ 30 ~ 68mm, 73mm BB shells. ~ Common Cranks: White Industries, SRAM, Race Face Fit Kit #5 (PBB085) for ThreadFitâ„¢ T47 30x and T47 30i with 30mm spindle cranksets. ~ For use with ThreadFitâ„¢ T47 30x and T47 30i ~ 68mm, 73mm BB shells. ~ Common Cranks: White Industries, SRAM, Race Face Click here for the Fit Kit Instruction Manual > https://cdn.shopify.com/s/files/1/2920/2114/files/Fit_Kit_Instructions.pdf?1726 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