The SXg eliminates ALL possibilities for drivetrain mechanicals or dropped chains, so you can focus on pinning and winning.The SXg features upper and lower chain retention, as well as burly bash protection. Completely silent and efficient, the upper and lower guides are easily setup for zero rubbing and, with no moving parts, introduce zero drag into your drivetrain. Fibre-infused bash protection lets you charge through rock gardens without a care in the world.When taking the fastest or gnarliest lines, no other guide can compete.This version of the SXg is custom designed to fit the Norco range of bikes with a high idler fitted.Fits 32âÂÂ38t chainring.