Salsa Ring Dingers Guards Ring Dinger guards are a lightweight solution for protecting your drivetrain from chainring-eating obstacles. They are perfect for dual ring or single ring cross-country action. Pair one up with a front chain keeper device for a super simple 9-speed setup.- Perfect for single-speed & 9-speed setups- CNC-machined 6061-T6 aluminum- 94 104 & 110 BCD- 36 tooth maximum- 44 grams for 110 BCD- Black or Silver