Offering all the precision and functionality of the DURA-ACE road bike power meter, the ULTEGRA FC-R8100-P road bike power meter comes in a more affordable package.

Scientific training requires accurate measurement and user-friendliness, and the new ULTEGRA R8100 power meter delivers both. Its dual-sided measurement is accurate within 2.0%, and zero offset calibration is a quick and easy process. Importantly, its long battery life, easy recharge, and ANT+ and Bluetooth®LE connectivity make using and recording your workouts easier than ever.

Features:

Integrated, waterproof, and rechargeable Li-ion battery
- Up to 300+ hours of ride time * Depending on ANT+/Bluetooth®LE settings
- Accurate data collection
- ±2.0% strain gauge accuracy throughout the entire calibration range
- Proprietary strain gauge
- Quick start capability
- Simple zero offset calibration with switch on transmitter
- Active temperature compensation
- Software automatically compensates for temperature changes
- Provision of new force vector data makes it the optimal training tool to analyze and improve pedal stroke efficiency
- With SHIMANO CONNECT Lab, you can analyze and visualize your training and power data

Accurately calibrated strain gauges are integrated inside the crank arm, providing a stable measurement system through rotation from both sides for extremely precise data.

- +/-2% accuracy of strain gauge measured power.
- Bluetooth and ANT+ with wireless firmware update and data acquisition system.
- Easily rechargeable integrated battery with fully waterproof reliable electric system.
- HollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load.
- The chainring teeth have been developed to work in conjunction with 12-speed HG chains for increased contact to provide greater efficiency and improved power transfer.
- Industry-leading HollowTech II cold-forged 4-arm hollow cranks have been evolved for maximum rigidity while reducing weight.
- Wide gear pitch spacing increases clearance between chain and leading teeth to provide compatibility with frames with O.L.D. 135 / 142 mm.
- A wide range of chainring options and crank arm lengths are available to meet the needs of all riders and racing disciplines.
- HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency.
- HollowTech II integrated bottom bracket seal design has minimal bearing interface, ensuring smooth rolling and increased durability (sold separately).

Genuine, brand new, boxed Shimano product - Biketart are an official UK Shimano stockist.