* Wide application-- 28.9mm center distance greatly enhances compatibility and is easily compatible for mountain 40/42/46/50/52T and for road 34/36/40/42T.
* Accurate adjustment-- The structure is upgraded, accurate adjustment and increase the response speed of variable speed. Abolish the limit position, increase the fine-tuning range and make it easier to adjust.
* tail hook fitting surface design -- The tail hook fitting surface adopts radial to increase friction and solve the problem of looseness caused by vibration during riding. The locking screw made of 7075 aluminum alloy, and the locking torque is greater.
* Stable performance-- The total length is only 50.8mm, achieving high compatibility and stability (too short center distance affects compatibility; too long center distance affects stability).
* Hollow design-- Hollow out , lightweight and beautiful while ensuring strength. High-quality material, strong, durability and has long life.