Specialized Offset - This crank model is most suitable for Specialized Turbo systems using the ISIS mount including: Levo, Kenevo, Vado, Como, Turbo Levo e-bikes. Please note this model is not suitable for any Levo SL MTN E-Bikes using the Specialized SL 1.1 M30 motorDesigned for maximum ground clearance,Self-extracting system for easy fitting and removal,Available in 155mm and 165mm length,Optimised Q-factor for compatibility with most frame/motor combinations,Arms available in Black, Blue, Red, Silver, Purple and Orange,Proudly Designed, Tested and Manufactured in Barnoldswick, UK,Weight: From 472g,Forged and CNC machined 7150 series aluminium alloy crank arms.**Please Note**: Compatible with motor systems using an ISIS spline axle/crank arm interface only