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- Highly sought after narrow-wide tooth design provides excellent chain retention without a chain guide \n- Perfect for 1x setups and compatible with 9/10/11, and 12 speed systems, 9 speed drivetrains require a 10 speed chain \n- 30 tooth features built in tabs for a 49.5mm chainline and is threaded for ideal fitment\n- CNC'd in Canada from 7075 aluminum with laser etched graphics