FSA PowerBox/SL-K Road Chainring

This chainring is designed for 4-bolt cranksets with a 110mm asymmetric bolt circle diameter (BCD). Please verify that your crankset uses this specific asymmetric pattern, as it is not compatible with standard symmetrical 110mm BCD setups.

The structural design and stiffness of this ring are engineered to minimize flex during power transfer. This ensures that the strain gauges on your power meter receive consistent, accurate data without interference from material deformation.

No, this is specifically designed as an outer chainring. The ramp and pin configuration, along with the tooth profile, are optimized for shifting performance in the outer position.

It is constructed from high-grade aluminum, which strikes an ideal balance between low weight and long-term durability. It is built to withstand the high torque demands of road cycling while maintaining its shape over thousands of miles.

Yes, moving to a 53-tooth ring may require you to adjust the height and angle of your front derailleur to ensure smooth shifting. Always check that your front derailleur has the capacity to handle the larger ring size before installation.