Alloy Bike Clipless Pedals Platform Adapter for XT SPD SPD-SL Keo Candy Universal No Clip Mount Bicycles Pedal Adapter Plate
Amazon.com: Thinvik Road Bike Clipless Pedal Convert to Flat Pedals,Universal Platform Pedal Adapters for Shimano SPD-SL System Pedal(Only Work on Shimano Road Bike Pedals) : Everything Else
Amazon.com : corki Cycles Clipless Wide Platform Adapter Flat Pedals for Clip-in Pedals Shimano SPD Speedplay : Sports & Outdoors
Crankwork can make your SPDs into flats with its adaptors