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SPD Cleats-SH51 Versus SH56?
SPD Cleats-SH51 Versus SH56?
Visual difference between Shimano SPD cleats SM-SH51 (black) and SM-SH56 (silver) : r/bicycling
Amazon.com : CyclingDeal Bike Cleats Compatible with Shimano SPD SM-SH56 - for Indoor Cycling & MTB Mountain Bike Bicycle - Clips for Indoor Shoes (Multi-Release) : Sports & Outdoors