e*thirteen e*spec Direct Mount Chainring - 34t 11/12 Speed For TQ CL55 Blacke*thirteen e*spec Direct Mount Chainring 34t 11 12 Speed For TQ CL55 Black. e*spec direct mount chainrings use e*thirteens 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