Di2 and 10- or 11-speed Shimano Integration.
Complete your dream bike build with the industry standard in precision power measurement.
The SRM Shimano 7800 PowerMeter was designed for Shimano users that want to run other chainrings such as Praxis Works or Rotor Q-rings with their Di2 Electronic shifting. Electronic shifting systems make gear changes faster and virtually eliminate missed shifts, but the forces on the chain rings are much higher than with mechanical derailleurs. If you ride Shimano DuraAce 7800 PowerMeter on mechanical or Di2 electronic 10- or 11-speed gruppos, you will benefit from increased power transmission!
Weight: 820 g 7800
Q-Factor: 147.5 mm
Wireless: ANT+ Compatible
Battery Life: 1900 hours
Accuracy: < 1.0% error
PowerMeter Spider 130 BCD
Drive and Non-Drive Side Shimano FC-SR70 Crank Arms
Not including chainrings or optional 53/39 Praxis Works or Rotor Q-Rings (both incl. chainring bolts)
Cadence Magnet Kit