Shimano SLX FCM665 Chainring

No, this chainring is specifically engineered for 9-speed drivetrains. Using it with a 10 or 11-speed chain may result in poor shifting performance and increased wear due to differences in chain width.

No, this product includes only the chainring itself. You will need to reuse your existing chainring bolts or purchase a new set separately.

As long as your crankset uses a standard 104mm bolt circle diameter (BCD) and a 4-bolt mounting pattern, this ring should fit. However, shifting performance is optimized when paired with Shimano-specific ramps and pins, so results may vary with other brands.

The 104mm BCD (Bolt Circle Diameter) is the measurement of the circle formed by the centers of the four mounting holes. You must match this measurement exactly to your crank arm spider to ensure the bolt holes align correctly.

While it can physically mount to a single-speed crank, it is designed with shift ramps and pins to help the chain move between gears. For a dedicated single-speed setup, a 'narrow-wide' chainring without shift ramps is generally preferred to prevent chain drop.