The Sigeyi AXO SL Race Face MTB Power Meter is a spider-based power meter that is compatible with Race Face direct mount cranksets. The Sigeyi AXO SL improves upon the previous version AXO by reducing weight and adding pedaling smoothness data. All Sigeyi power meters measure power from both legs and are accurate to +/- 1.0%. Moreover, they easily attach up to your existing Race Face crankset. This means there is no need to buy new cranks or replace your bottom bracket.

This Sigeyi power meter also features a rechargeable battery with 300 hours of ride time, auto-zero functionality (so your data is always accurate), left and right leg power balance and a 2-year manufacturers warranty. Of course, you also get Bluetooth Smart. This allows you to use the power meter with your favorite indoor training program or app.