if you can't wait to upgrade your Ultegra R8100 with a Stages Left side powermeter, you can now take advantage of the excellence of their 3rd generation meter pod, with advanced antenna power and capability. While there are power meters on the market with price ranges well into thousands of dollars; generating, measuring and applying detailed, useful, and accurate power data can be achieved simply with a left arm replacement. Sure, there are benefits to dual side measurement, but the cost is high. This Gen 3 equipped, redesigned R8100 Stages left crank arm features the 6x powerful transmitter for better head unit and sport watch connection capability and measures power.
Why measure power at all? Power gives you a clear representation of effort and output that is consistent. Knowledge of power data allows you to exploit your strengths, improve your weaknesses, and plan crucial recovery. It is true that there are cyclists, most at the highest levels of the sport, who can truly benefit from accurate individual leg and spin cycle measurement. Cyclists overcoming injuries may also find this highly useful, though physical therapists can assess such imbalances as well. The key for Stages is: power differential between legs has no major influence on ride data and its value as a training tool. For example, the engineers found through thousands of miles of testing research that power differential between legs has no significant influence on ride data. This helps to significantly reduce complexity and cost while providing power measurement with ±2% accuracy. Active Temperature Compensation (ATC) takes place automatically and continuously while you pedal, allowing you to simply ride and use utilize your data without worrying about manual adjustments.
The Stages Power L Ultegra R8100 Meter is a left crank arm based system with a 15 gram power meter unit bonded to new factory left side crank arm. With the simplest installation, setup and pairing, Stages delivers accurate and consistent power measurement to power seeking cyclists and triathletes. Stages power meters are ANT+ and Bluetooth dual channel compatible to work with a host of head units and devices at the present and into the future. You can use your Stages Power Meter with almost any current smartphone via Bluetooth Smart with two-way interaction, and simultaneously be connected to your ANT+ compatible computer/GPS head unit for in-ride data and collection. The StagesPOWER App offers several key features and functions, is easy to use and is free for Stages Power Meter owners.
Installation of the L Ultegra R8100 Meter is just a matter of replacing your existing left side crankarm with the Stages equipped version. Simply remove your left crank arm, and install the Stages arm. No magnets, zipties sensors or additional hardware required. Done. The head unit pairing and Zero calibration tasks are just as simple. The Stages unit is equipped with an accelerometer that tracks crank position during rotation to calculate cadence. The Gen3 pod sends the cadence and power information to your connected devices. Truly simple. The Stages self-contained pod means that from installation of the power meter to riding generally takes about 10 minutes. Install, pair the power meter to a compatible head unit, Zero calibrate, go ride. Easy. Stages even provides excellent instructions and support through their website.
It is crucial for accurate training and analysis that the meter be consistent to itself, that the rider can quickly and easily set Zero calibration at the start of every ride, and that temperature is always accounted for. As Stages constantly corrects for temperature, accuracy is much better over many of it's competitors (whose units don't auto correct, or do so with far less frequency) whenever there is a significant change in temperature during your ride. Temperature can seriously affect the strain gage systems used to measure power, to the point where a long climb in the mountains during which weather and temperatures can greatly fluctuate, uncorrected data is nearly worthless.
To deliver proper metrics, the pod location on the arm is crucial, and the arm and pod are tested and calibrated together to ensure that the strain gages and sensors are working optimally with the specific crank arm. The pod itself is made of an incredibly strong polycarbonate blend that is similar material to that used in bulletproof glass. This material is perfect due to its light weight, superior durability and impact protection. Additionally, the Stages Power meter is highly sealed against environmental conditions, and carries an IPX7 water resistance rating, which means it can be submerged in water up to 1 meter for a maximum of 30 minutes. We highly recommend you never pressure wash near the bottom bracket/ crank assembly anyway, so if you follow that standard, you won't be pressure washing your Stages Power Meter anyway.
It was crucial to Stages to make their power meter efficient, as well as keep their firmware updated. This version of the Stages Power Meter is their Gen3 pod, which is more streamlined than the original model and has the advanced antenna system. The battery compartment and door were improved and strengthened. It is easy to change the battery, a coin-style, readily available CR2032 model. Each CR2032 delivers 200+ hours of power to the unit. The StagesPOWER App also keeps track of the battery level, so you can be prepared. Firmware is updated via this smartphone app as well. Stages regularly advances their firmware and app to reflect new features and updates. The app is user friendly and will become your best friend as you manage your power meter, allowing for direct updates to Training Peaks, Strava, Garmin Training Center and other cloud-based training systems. Ride R9100 and want to take advantage of power-informed trainer? This is the easiest, yet highly reliable option.Return to Top
- Most accessible, easiest to install/use, direct force crank arm power meter
- Ultegra R8100 series crankarms have been redesigned for better strength and overall design in power meter applications
- Power meter accuracy: ± 1.5%
- Features Gen3 power meter pod affixed to new R8000 left side crank arm
- New transmitter delivers 6x more powerful output
- Installation as simple as properly mounting and fixing left side crank arm
- Head unit pairing and daily Zero calibration processes quick and straightforward
- Power range (Watts): 0 to 2500
- Active Temperature Compensation delivers continual accuracy while riding
- ANT+ and Bluetooth Smart communication keeps unit future-proof
- Factory bonded pod contains all electronics, strain gages, power source
- Tool free, user replaceable CR2032 battery via externally accessible compartment
- Internal accelerometer determines cadence throughout pedal stroke
- Cadence range (rpm): 20-220
- Firmware updates, data uploads accomplished wirelessly with Bluetooth Smart
- Water resistance rating: IPX7 (do not use direct stream hose/pressure washer)
- Device compatibility with simultaneous dual channel ANT+, Bluetooth Smart
- StagesPOWER App allows you to manage your unit, collect and transmit data
- Crank/Bottom Bracket compatibility: Shimano Hollowtech II road cranks
- Always install crank arm to Shimano's specifications
- Weight: Adds 15 grams to base crank arm
- Finish: Ultegra R8100 Dark Grey w/Stages logo
- Select: Crank arm length