3D printed titanium crankset designed specifically for E-Bikes. Electric Wings are light weight, stiff, and above all extremely durable. As light as carbon cranks and as durable as aluminum cranks, the Electric Wings are the only option for E-bike riders looking for both weight savings and durability. Electric Wings are compatible with electric bike drive units that use an ISIS crank spindle and is the best crank upgrade option for both E-MTB and E-Gravel/Road on the market.* 3D Printed 6/4 Titanium* ISIS Spindle Interface* Compatible with select motors from Bosch, Brose, Fazua, Panasonic, TQ, and Yamaha* 383g