4iiii PRECISION Shimano Ultegra R8100 Single-Sided Crankset

4iiii PRECISION 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 crankset! 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. This means you can use it with your favorite bike computer, smart phone or indoor training app.

Please note – this crankset measures left leg power only.

Key Product Details

Compatibility:

This power meter is compatible with 2×12 road drivetrains and 24 mm Shimano bottom brackets. Most customers that buy it already have a Shimano R8100 crankset on their bike and therefore, it’s an easy swap. However, it can be used on any road bike as long as its 2×12 with a 24 mm bottom bracket. See Compatibility tab for more information.

Power Measurement:

This 4iiii power meter measures left leg power and doubles the value to account for both legs (assumes both legs are generating the same force).

New 4iiii R8100 PRECISION 3!

The all new 4iiii R8100 PRECISION 3 power meter features the following improvements over the version 2:

• 800 hours of battery life – the longest coin cell battery life in a power meter on the market!
• Sleeker, slimmer profile making most incompatibility issues a thing of the past.
• Stronger antenna for even better connectivity.
• Indicator light for battery life, successful zero-offset and when the unit has been turned on.

Key Features:

Accurate to within +/- 1.0%, lightweight at only 9 grams of added weight, 800 hours of battery life, CR2032 user-replaceable battery, ANT+ and Bluetooth compatible, 3-year warranty. See Specs tab for more information.

Advice From Our Staff:

This is a great option for customers with a Shimano R8100 drivetrain that want to keep an OEM R8100 crankset on their bike but add power. We also like that fact that this crankset has a 3-year warranty, which is longer than most power meters.

Options For This Power Meter

• Chainrings: 50/34 | 52/36
• Crank arm lengths: 165 mm | 170 mm | 172.5 mm | 175 mm

Other Versions to Consider

Dual-Sided R8100 Crankset: We also sell the 4iiii PRECISION PRO Shimano Ultegra R8100 Dual-Sided Crankset which is a complete crankset. It is more expensive, however it measures power from both legs.