Amazon.com : Thinvik Clipless Pedal Adapter for Shimano SPD Pedal - Clip Pedal Convert to Universal Platform Pedal - (Only Work on MTB Bike Pedal : Sports & Outdoors
For Shimano | SPD and SPD-SL – Pocket Pedals
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Amazon.com : ROCKBROS Clipless Bike Pedal to Convert Flat Pedals Universal Platform Pedal Adapters for Shimano SPD System Mountain Pedal MTB Bicylce Pedals : Sports & Outdoors
The Lab: TATZE ADD-FLAT Adapter Review | ENDURO Mountainbike Magazine