Reliable CNC aluminum construction Made from CNC-machined aluminum alloy for high strength and durability on all your rides. Narrow-wide tooth design Features alternating narrow and wide teeth to reduce chain drops and provide a secure, worry-free ride. Broad compatibility Fits 9-, 10-, and 11-speed drivetrains, offering flexibility across different bikes and setups. Four sizes to choose from Available in 42T, 44T, 46T, or 48T to match your gearing needs and terrain preferences. Use scenarios - Trail riding on technical sections where secure chain engagement matters for confident power transfer. - Gravel rides with mixed surfaces that benefit from reliable chain retention and efficient pedaling. - Upgrading an existing 9/10/11-speed system to improve durability and performance without changing other components.