FSA Pro Mountain Chainring

This chainring features a 64 mm Bolt Circle Diameter (BCD). You must verify that your crankset is compatible with this specific BCD measurement before purchasing, as it is a standard size for many mountain bike cranksets but not universal.

The ramps and stainless steel pins are strategically placed to help the chain lift onto the next gear more smoothly. This design significantly improves shifting reliability, especially when you are pedaling hard under load.

Yes, AL7075/T6 is a high-grade aerospace aluminum alloy known for its excellent strength-to-weight ratio. It is specifically chosen for this application because it resists wear and deformation better than standard aluminum, making it well-suited for the demands of mountain biking.

Installation requires standard hex keys or Torx wrenches, depending on your specific crankset's chainring bolts. You do not need any proprietary tools, though a torque wrench is highly recommended to ensure the bolts are tightened to the manufacturer's specifications.

This specific chainring is designed with ramps and pins to facilitate shifting between multiple chainrings, which is ideal for 2x or 3x drivetrains. If you are running a 1x setup, you would typically want a 'narrow-wide' chainring to prevent chain drop, rather than this ramped model.