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Amazon.com : 4iiii Precision Powermeter Left Side | Shimano 105-R7000 | 170mm | Measures Each Pedal Stroke with 3D Strain Gauges : Sports & Outdoors
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Amazon.com : 4iiii Precision Pro Powermeter | Shimano FC-R7000 | 172.5mm/53-39T | View Advanced Metrics Like Left/Right Balance, Pedal Smoothness, and Torque Effectiveness | For Training & Racing : Sports & Outdoors
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