4iiii PRECISION 3 Shimano Ultegra R8100 Single-Sided Crankset. The 4iiii PRECISION Shimano Ultegra R8100 Single-Sided Crankset brings 4iiii left side power to Shimano's new Ultegra 12-speed groupset! The 4iiii PRECISION 3 power sensor is accurate to +/- 1.0%, is lightweight and features an 800 hour battery life.
The power meter is compatible with both ANT+ and Bluetooth SMART devices. Please note - this crankset measures left leg power only. You will need the following tools for installation of this product. Shimano Crank Arm Cap Tool.4iiii PRECISION Shimano Ultegra R8100 Single-Sided Crankset. This power meter uses a 24 mm Shimano road spindle and must be used with a 24 mm Shimano bottom bracket. Tip - If you already have a Shimano crankset on your bike, then this power meter will fit your bottom bracket perfectly as all Shimano cranksets use a 24 mm spindle. Crank-arm based power meters like this one attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance between the left crank arm and the chainstay - and that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below. If you find that you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need. 4iiii PRECISION 3 R8000 Crankset. Left or Both Legs Measured. Expert advice and customer service in case you need any help.
At Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service.We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell. This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters".
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