Race Face BB92/89 30mm External Seal Bottom Bracket The Race Face CINCH Bottom Bracket for 30mm spindle cranksets is designed specifically for compatibility with Shimano press-fit bottom bracket shells, particularly the BB89.5 and BB92 interfaces. Here’s a summary of the key features and details: Features - Compatibility: Enables use of Race Face CINCH 30mm spindle cranksets with Shimano BB89.5 or BB92 press-fit bottom bracket shells (41mm shell diameter). - Installation: Installs with a standard bearing press tool, making setup accessible for most bike mechanics and enthusiasts. - Components: Comes with an inner plastic sleeve and spacers for easy fitting; further adjustments are possible with CINCH spacer kits for optimal compatibility. - Water Protection: The inner sleeve and external rubber seal help guard against water ingress, enhancing durability. - Shell Width: Works with a 92mm shell width. - Weight: Lightweight, weighing just 69 grams. This bottom bracket is ideal for cyclists looking to pair Race Face CINCH cranks with Shimano's press-fit frames, particularly for setups prioritizing durability and efficient installation.