e*thirteen e*spec Direct Mount Chainring - 34t, 11/12 Speed, For TQ CL55, Blacke*spec direct mount chainrings use e*thirteen's M3 narrow wide tooth profile, which reduces weight without sacrificing chain retention. These lightweight and well designed chainrings are adapted to work with TQ CL55 eBike motor configurations. The M3 dual width tooth profile eliminates chain noise, and decreases overall system wear 55mm Boost chainline Constructed with 7050 aluminum for durability and light weight For use with 11 and 12 Speed