With the help of top pros, coaches and scientists, we've made PowerTap SL smaller and 160 grams lighter. We've also added a new electronics package that's housed completely within the hub shell. It sends the data through carbon fiber power windows, keeping moisture away from sensitive components.

The Race-Ready Powertap
- Customizable display shows power, heart rate and cadence simultaneously.
- Download up to 15 hours at 1-second recording rates.
- Records unlimited intervals.
- Cadence sensor.
- Functions as a downloadable heart rate monitor for multisport.
- Computer also works as a cycle computer when not using PowerTap hub.
- Available in either Shimano or Campagnolo cassette body
- 130 mm (road) or 135 mm (mtb) spacing
- Carbon fiber insert for reduced weight
- 4 sealed cartridge bearings
- Lightweight aluminum axle