Our ThreadFit™ T47 Bottom Bracket is the solution. A silky smooth, long-lasting bottom bracket built around our angular contact bearings that wear in instead of out. ThreadFit™ T47 provides the security and reliability of a threaded bottom bracket with the stiffness and power transfer gains of a PressFit 30 bottom bracket shell. ThreadFit™ T47 24x fits 68mm and 73mm shell widths with 24mm spindles. ThreadFit™ T47 24i fits 86mm and 92mm shell widths with 24mm spindles. ThreadFit™ T47 30x fits 68mm and 73mm shell widths with 30mm spindles. ThreadFit™ T47 30i will fit 68mm, 73mm, 83mm, 86mm, and 92mm shell widths with 30mm spindles, or 68mm and 73mm shell widths with 24mm and 24mm stepped spindles Lifetime warranty Legendary made-in-house bearings Easily serviceable with our grease injection tool Ceramic bearing upgrade available Threaded security with PressFit 30 shell stiffness Conversion kits available Engineered, manufactured and assembled in Portland, Oregon USA Install with Theadfit 30/T47X Tool only. REQUIRES A KING CONVERSION KIT TO COMPLETE INSTALLATION All of our bottom bracket offerings will use an appropriate Conversion Kit specific to the brand and model of crankset to be used. Our Conversion Kits are made to account for crank manufacturers' machining tolerances and ensure they mate perfectly with our precision bearings, extending product life, and reduce the potential for noise. CONVERSION KIT #4 (PBB084) For use with ThreadFit™ 24 For cranksets with 24mm spindles. CONVERSION KIT #6 (PBB086) for SRAM GXP cranks. For use with ThreadFit™ 24, ThreadFit™ T47 24i, ThreadFit™ T47 24x 68mm, 73mm, 73mm SB+, 86.5mm, 92mm, and 92mm SB+ BB shells.