Alter Cycles, Taiwanese brand. Every parts all washed by complete aluminium board which takes lots of time and cost. Taiwan is the most popular bicycle manufacturer country. Alter Cycles insist to build exquisite high quality bicycle component.


Use 5mm marine class 7075 aluminium board with CNC finish. Delicated angle, calculated strength and teeth length makes driving force performance better than others.

The detail and hardness also cannot doubt. 


Fantastic chainring hot sell worldwide!



Color: Black/ Purple

Teeth: 15T/ 16T/ 17T/ 18T/ 19T

Spec: BC1.37 X 24FPI 1/8 "

Weight: 15T=21g / 16T=25g / 17T=29.2g / 18T=34g / 19T=38.2g




Made In Taiwan.

Alter Cycles Midnight Cog


CNC 7075 Aluminium