![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/W/IMAGERENDERING_521856-T1/images/I/215RcM0QxYL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFOURANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA30%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Amazon.com: 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 172.5mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors
![4iiii Shop - USA/World: Single-sided and dual-sided power meters for Shimano, SRAM, Praxis, and Campagnolo cranks 4iiii Shop - USA/World: Single-sided and dual-sided power meters for Shimano, SRAM, Praxis, and Campagnolo cranks](https://cdn.shopify.com/s/files/1/1079/1696/products/4iiii_PRECISION_PRO_9100_Small_4cb53e46-df00-4f79-81c5-6b4715e7740d_large.jpg?v=1616788535)
4iiii Shop - USA/World: Single-sided and dual-sided power meters for Shimano, SRAM, Praxis, and Campagnolo cranks
![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/W/IMAGERENDERING_521856-T1/images/I/5199-GeftSL._AC_UL210_SR210,210_.jpg)