Stages 105 5800 1st gen Road Bike Power Meter

Stages Powermeter for Shimano 105 5800 cranksets. The Stages powermeter unit is pre-assembled in the left crank arm, which is mounted as a substitute for your original crank arm. The Stages 105 5800 crank arm fits also on other models just like the Shimano Ultegra 6800 or Dura-Ace 9000.

The Stages power meter measures the transferred power real accurate(± 2% deviation) Because this unit is mounted in the crank arm, the power meter is very lightweight and small. In comparison with a normal crank arm its only 20 grams heavier. Thats why the Stages unit is the lightest power meter on the market, with a difference of 33 up to 185 grams compared to competing powermeters and all of that for the best attractive price.

The data transfer uses ANT + and Bluetooth Smart technology, making all your favorite head units compatible,and upgrade your firmware wireless using your phone.
The cadence is measured wireless and without additional sensors, using the intern accelerometer. The data thats been displayed is without a filter, the competator did have to add a filter to display accurate data.

Note: check if your powermeter iis compatable with your direct mount rear break, underneath your bottom bracket.