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Amazon.com : 4iiii Precision Powermeter Left Side | Shimano Ultegra R8000 | 170mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors
4iiii Precision 3 Shimano Ultegra FC-R8000 Crank-Based Power Meter (Left Crank) Black | Alltricks.com
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