Our ThreadFit™ 24 bottom brackets are designed and built to be durable, serviceable, and silent. Manufactured to create a precise and functional interface between your frames' bottom bracket shell and your 24mm cranks, our ThreadFIt™ 24 bottom brackets ensure that your cranks will spin lightly and without interference. To help with bike fit issues we have developed a range of conversion kits that allow our ThreadFit™ 24 to be used with a wide selection of road and mountain bike cranks. As with all Chris King components in our ThreadFit™ 24 bottom brackets it all starts with the bearings. We make our bearings in-house and our process allows us to place more balls per bearing than our competitors. More rolling elements per bearing translates to a stronger overall bearing system. A bottom bracket-specific upgrade to our legendary sealing system allows the bearings to be purged and re-greased using our precision made injector tool. This combination of strength and serviceability gives us the confidence to offer an industry-leading 5-year warranty on our bottom brackets. •Engineered, manufactured and assembled in Portland, Oregon USA. •5-year built-to-last warranty. •Easily serviceable with our integrated grease injection system. •Legendary in-house made bearings. •Available ceramic bearing upgrade. •Easily inject your choice of grease for different riding conditions. Learn more with our Grease Guide. >>> •Available in 9 beautifully anodized colors. •Weights: Stainless Steel 89.06grams-Steel / 85.02grams-Ceramic. 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.