Description: Compatibility: Specifically designed for CUES series FC-U4010/FC-U6000 cranksets, this adjustment ring is essential for fine tuning the clearance between the crank and bottom bracket, ensuring optimal performance and longevity of your bike componentsEasy Installation: The Crank Bottom Bracket Adjuster can be easily adjusted using a 2.5 mm hex wrench. Simply insert the wrench through the designated hole to rotate and adjust, making it user friendly even for those with minimal mechanical experienceQuality Material: Crafted from quality aluminum alloy, this crank preload adjustment ring offers good durability and resistance to wear, providing reliable performance in various riding conditionsFit: With an approximate diameter of 46 mm, this Bottom Bracket Preload Adjuster is engineered fit seamlessly with your crankset, ensuring a secure and stable connectionPractical Accessary: Each purchase includes 1pc preload adjustment ring, good for adjusting clearance between crank and bottom bracket Specification: Material: Aluminum Alloy Size Chart: Diameter:4.6 cm/1.81 inchInner Diameter: 2.45 cm/0.96 inch Package Includes: 1 CrankPreload Adjuster Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.