E*Thirteen E*Spec Race Carbon Gen4 ultralight carbon fiber cranks for E-Bike (Bosch Gen4 CX / Brose S Mag / Fazua Ride 50 Evation / TQ HPR50). Comes from the great experience of TRSr cranks in Enduro World Series, with only 390 grams for the pair (160 mm, bolts included) allows not only a weight saving but also greater stiffness and a better looks thanks to oversize design. They fit great with modern E-Bikes due to reduced thickness and low Q-Factor, they are very easy to install and remove thanks to the integrated self-extractor. Comes with protective silicone end boots and protective film on cranks sides. 160-165-170 mm lengths.