![Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors](https://images-na.ssl-images-amazon.com/images/I/61hCgiMY8+L._AC_UL900_SR615,900_.jpg)
Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors
![Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors](https://m.media-amazon.com/images/I/5199-GeftSL.jpg)
Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors
![New for 2017 is the Cateye/4iiii power meter. The power meter is available pre-installed into three different Shimano non-drive crank arms. Retail ranges from $420 USD for 105 to $620 USD for New for 2017 is the Cateye/4iiii power meter. The power meter is available pre-installed into three different Shimano non-drive crank arms. Retail ranges from $420 USD for 105 to $620 USD for](https://www.cxmagazine.com/wp-content/uploads/2016/10/cateye-power-meter-cxmagazine-gevans-new.jpg)