- Best quality Our GXP mountain bike chainrings are made from 7075-T6 aerospace aluminum alloy. They feature CNC high-speed engraving and milling, hard anodized treatment, and a T6 heat treatment process to deliver sturdy and durable performance for demanding riding. - Safe and efficient design CNC integrated machining increases rigidity and reliability for long-term cycling. The design offers extended tooth options with plus or minus tooth shapes to improve chain engagement and retention. - Lightweight design The chainring uses an alloy structure that is lightweight yet strong. It includes positive and negative tooth widths: positive teeth match the chain width, while negative teeth are narrower to help prevent the chain from dropping. - Chainring compatibility and options Narrow width offset options are available in 1, 3, and 6 mm. Compatible with MTB GXP XX1 X9 XO X01 NX XX GX 812 Speed cranksets. - Practical use scenarios 1) Cross-country and trail riding where reliable chain retention and lightweight components are important. 2) Enduro and all-mountain riding that demand durability and consistent performance under rough conditions. 3) Upgrading or replacing a worn chainring on compatible GXP cranksets to improve engagement and shifting reliability.