PowerTap  G3 Rear Hub - Shimano 24 Hole

In 2005 PowerTap introduced the world's first-ever wireless powermeter - and they're been striving to improve upon it ever since. Enter the G3, the third generation of hub-based power meters. The G3's design allows for a simple, straight-forward way to measure power. By mounting the strain gauges in an area where external forces, such as spoken tension, cannot impact power measurement, the PowerTap G3 is able to deliver +/- 1.5% accuracy ride after ride. More than just a powermeter, The G3 delivers speed, cadence and power with pin-point accuracy all in one product. And its ability to be easily switched between bikes means you'll never miss a watt. Features: Weighs a mere 325g. Simplest way to measure power. Specifications: Hub weighs a mere 325 grams Wider flanges for a stiffer overall wheel Smaller overall hub profile New field-serviceable electronics Powermeter accuracy of +/- 1.5% Axle: 15 mm alloy Hole Count: 20, 24, 28 and 32 Compatibility: Shimano/SRAM or Campagnolo Color: Black 11 Speed compatible Battery: Coin cell CR2032 QTY 1 Head Unit: Compatible with ANT+ and Bluetooth Smart devices.