The bottom bracket conversion sleeve is for cyclists who want to ensure their bike's bottom bracket is compatible with various cranksets. This sleeve allows for easy adaptation, making it ideal for upgrades and maintenance. Simply insert the sleeve into the bottom bracket shell, and it will adjust to the required size, providing a secure and efficient connection. Features -Color:Silver -Material:Aluminium Alloy -Size:2.50X2.50X1.00cm/0.98X0.98X0.39in -Broad compatibility: suitable for a wide range of bottom bracket conversion sleeves, making it easy to replace and upgrade bike components -Durable construction: made from durable materials that ensure durability and resistance to corrosion -Precision design: the precise design and manufacturing process a fit and reliable performance, enhancing the bike's stability -Easy to install: the straightforward installation process allows users to easily set up and adjust the conversion sleeve on their own -Improved riding comfort: the bottom bracket conversion sleeve enhances the bike's performance and rider comfort, providing a smoother ride Package list: 1 x Bicycle Bottom Bracket Adapter