Stages Power L Shimano Ultegra R8100 power meter crank arm

Tour Proven
Stages Power has carried riders to three consecutive Tour de France victories, plus many more world and national championships. If you believe racing provides the world’s best product proving ground, then Stages Power is proven as the world’s best power meter.

Active Temperature Compensation as standard equipment
Consistency of measurement is the most important feature of a power meter. Stages Power was the first meter to make temperature compensation an automatic process ensuring accurate readings no matter the environmental conditions. ATC is the key reason a rider can trust data from Stages Power in all conditions.

Individual meter calibration for the most accurate results
Each Stages Power meter is calibrated individually to ensure a +/- 1,5% accuracy level, which is an industry best for non-scientific power meters. Individual calibration for the dual-sided option means that you can trust the data produced by our system, as it's a real measurement and not an estimation.

Stages Power R drive-side meter for added compatibility or upgrading an existing Stages Power L meter to Stages Power LR
While not widespread there are some key bicycle models that are not compatibile with the non-drive crank arm based Stages Power meter because of interference with the power meter housing, for example Cervelo's P5 and many bikes with chainstay mounted brake calipers. Stages Power R offers increased compatibility with these models as well as the ability to upgrade existing Stages Power L power meters to Stages Power LR (dual) meter systems.

Features

Active temperature compensation.
Accelerometer based cadence measurement or the option to use a Hall-Effect based system with magnet (coming soon).
Wirelessly upgradable firmware.
LED indicator for visual indication of battery levels and zero reset confirmation without connected app or headunit.
Updated accelorometer and addition of gyroscope for improved cadence resolution.
Upgraded BLE and ANT+ radios offer a 6x improvement of data transmission strength.
Accuracy: +/- 1,5% accurate in all conditions.
Power meter housing: low profile design, with robust door interface. Tool free battery replacement on the left arm and phillips head screw access on the drive side.
Weight: Only adds 35g (Stages Power LR) / 15g (Stages Power L) / 20g (Stages Power R) to base crank set.
Battery life: 175+ hours (Stages Power LR, via 2 coin cell: CR2032), 200+ hours (coin cell: CR2032) when used as a single sided Stages Power L or Stages Power R meter.
Power range (Watts): 0 - 2500.
Cadence range (rpm): 20 - 220.
Water resistance rating: IPX7.
Real weight: 210 g.

Compatibility

Stages Power L is compatible with all Shimano Hollowtech II road drive side crank arms.
Frame Compatibility: Most frames, see fit guide in our Support section.
Software Compatibility: Stages Link, Training Peaks, Strava, Garmin Training Center and others.
Device Compatibility: ANT+, Bluetooth Smart Ready.

Included

Non-drive-side power meter.
High quality CR2032 coin cell battery.
Lifetime access to Stages Link for power meter management and firmware upgrade.
2 months free access to Stages Link premium training and coaching features.
Product Identification Card with Serial Number and ANT+ ID Number.
User Guide.