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Amazon.com : 4iiii Shimano 105 R7000 Precision Left-Side Power Meter Black, 172.5mm : Sports & Outdoors
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Amazon.com: 4iiii Precision Powermeter Left Side | Shimano FC-M9100-NDS | 175mm | Measures Each Pedal Stroke with 3 Strain Gauges : Sports & Outdoors
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