Racers looking for smart weight savings and optimized rotating weight will benefit from using XRAY's new optional lightweight XCA clutchbell made from CNC-machined premium Swiss 7075 T6 aluminum, hardcoated for extra durability and long life. The new clutchbell has reducing rotating weight without sacrificing strength or durability. Significant weight savings over standard clutchbell: original clutch bell (6.25g), optional lightweight clutchbell (2.75g).