Specialized e-Crank M30 Carbon With e-bike use around the globe booming, we recognized a huge need for high-end lightweight carbon e-crank arms. With the wide variety of motors out there, we also knew that we'd need an assortment of crank designs to fit all the different bikes. So, with the goal to bring Praxis high-performance to the world of e-bikes, we've launched a full line of carbon e-cranks for many of the industry's most well known motors. Working closely with Specialized, we've created e-crank arms for many of their e-bikes. Simply pull off the stock aluminium crankarms and bolt on these carbon cranks for a lighter, higher performance setup on your Specialized e-bike. eCranks for new Specialized SL 1.1 motor with M30 Spindle/spline. Version for the Creo Road family and Levo SL MTN family.