Absoluteblack Oval Rf Boost 148
The Original one and only absoluteBLACK Premium 1X RaceFace Boost compatible, narrow wide Oval chainring designed for RaceFace CINCH direct mount system. This version is for Boost bikes and FAT BIKES (when reversed). Optimized for 10/11 & Eagle 12spd. It is the most Premium oval chainring on the market with scientifically proven performance gains.