Material: Made of aluminum alloy material, light weight does not put an extra burden on the bicycle.
Spring Design: This chain adjuster can change multi-speed bikes into single speed bike.
For 11T/13T Derailleur: Ensures perfect tension for your chain to make you pedal with less efforts.
Universal: It can fit various sizes of gear, and prevent chain from skidding out from the crank.
Usage: MTB, road racing, fixie bikes, single speed bikes, bmx's, freestyl-e bikes.
Colour: As Picture Show
Size: 1pc
Height: 0
Length: 5
Width: 0