The BSA-MTB-GXP Bottom Bracket is designed specifically for Sram GXP cranksets, making it an ideal choice for traditional threaded mountain bike frames. This high-quality bottom bracket features advanced ceramic bearings that enhance performance and durability, allowing for smoother pedaling and reduced friction. Equipped with Cross Seals, the BSA-MTB-GXP helps to keep out dirt and debris, ensuring longevity and reliability in various riding conditions. Whether you're navigating rugged trails or tackling steep climbs, this bottom bracket is built to withstand the demands of mountain biking. With its perfect compatibility and top-notch materials, the BSA-MTB-GXP provides the performance upgrade that serious riders are looking for. Experience improved efficiency and a responsive ride with this essential component for your bike setup. For installation, use a 16 notch tool with an internal diameter of 42.7mm (measured at the inside of the notches). This is your most traditional tool for BSA bottom brackets, previously used by Sram GXP, Chris King, Campagnolo and older style Shimano. Example: Park tool BBT9 or BBT 69.4