Ultegra R8000 Bluetooth Power Meter Crankset
Pioneer is well versed in the world of electronics and it's taken that knowledge to the cycling world creating a powermeter that's made quite the impact in power measuring circles. It's had the opportunity to test the power meters under the sport's most elite athletes with teams like Team Lotto and Giant-Alpecin where these meters are subjected to harsher conditions, longer races and training, and if we're guessing, more power washing, than what we'll ever subject to our own bikes. It's safe to say that Pioneer has its design dialed and if you're looking to take your training to the next level, you're looking at the right product. The system here, the Ultegra R8000 Bluetooth Power Meter Crankset, is a powermeter that gives you a sleek and integrated package providing extremely accurate feedback from its dual-leg strain gauges to your bike's computer.
Pioneer's system monitors pedaling forces, cadence, and efficiency via its dual strain gauges housed on both crankarms. The transmitter bolts directly to the Shimano spider for a smooth profile and seamless integration. The sensors have the ability to capture 12 points of rotation per leg, at 30-degree intervals. They work by measuring minute deflection in the shape of the crank when pedaling forces are applied. This force is calculated in both the direction of rotation and the radial direction. Plugging the force and velocity of the crankarms into an equation, power, measured in watts, is accurately formulated. To further measure efficiency, a magnet ring attaches to the bottom bracket and measures the position of the crank displaying force vectors at every 30-degree interval throughout the pedal stroke.
The force vectors of each rotation are then wirelessly transmitted to your Bluetooth LE or ANT+ head unit of choice, or Pioneer's SGX-CA900 and 500 models, for displaying the pedaling efficiency. When used for training and racing, the goal is to target these efficiencies whenever possible to get the most out of every pedal stroke. The force measured in the direction of rotation at each of the 12 points is combined to give the total power output for that rotation. By measuring power in this way, Pioneer's system is more accurate than powermeters that don't gather information at these force vectors.
All of your ride data is stored in a file that's easy to access and analyze. You can even upload your log data to Pioneer's Cyclo-Sphere website, where you can analyze left and right side pedaling efficiency, different power numbers, and force vectors, placing the metrics in easy to read graphs and numerical displays.
As this is a plug-and-play product, we should speak a little on Shimano's R8000 crankset. It continues the tradition of trickle-down technology from Dura-Ace. The R8000 aesthetics mirror that of 9100 with broader arms and of course, a 4-arm asymmetric spider. The spider not only drops weight from previous designs it allows you to run rings from climb-friendly compacts to huge, TT-fast ones. Shimano bestows it's excellent Hollowtech II construction which brings weight saving, stiffness, and durability to new levels. We also like that this powermeter keeps our drivetrain pure Shimano so our shifting remains pristine and doesn't sacrifice performance that may occur when subbing in third-party cranks or rings.
The Pioneer Ultegra R8000 Powermeter Crankset is available in sizes from 165 to 175mm, with the following chainring configurations: 50/34t, 52/36t, and 53/39t. The powermeter operates with any ANT+ or Bluetooth device but to get the most data available, it is recommended to pair with Pioneer's SGX-CA900 and 500 computers.
- A crank-based powermeter with extraordinary data capability
- Now compatible with both Bluetooth LE and ANT+ cycling computers
- R8000 crank is lightweight with precise shifting rings
- Uploads data via Wi-Fi to Pioneer CycloSphere software
- Provides torque vector data when paired with Pioneer computers