3 bolt to 2 bolt SPD adapters. Convert your road cycling shoes to 2 bolt SPD - YouTube
Review: Every cyclist should have Pocket Pedals' slip-on platform pedals - Bikerumor
Tutorial - How to switch from 3 holes to SPD - YouTube
Shimano SPD Cleat Adapter, Black | Bikeinn
Amazon.com : NELboNs Road Bike SPD Cleat Stabilizing Adapter Bicycle Shoes Cleats Adapters Moutain Bike Shoe Cleats Pedals Compatible with Shimano SH41 SPD Cleats : Sports & Outdoors
Bontrager Road Shoe SPD Pedal Adapter - Trek Bikes
For Shimano | SPD and SPD-SL – Pocket Pedals
Bike Pedals Cleat Converter Adapter Bicycle Pedal Clip Converter for Road Conversion Mountain Bike Shoe Cleat For Shimano
Shimano SM-SH41 SPD Cleat Adapters | REI Co-op
Shimano Cleat Adapters - Adapt 3-Hole Shoes to 2-Hole Cleats
Amazon.com : CyclingDeal Bicycle Shoes Cleats Adapters - for MTB Shoes to Use with Cleats of Road Bike Pedals - Compatible with Shimano SPD-SL, Look KEO & Look Delta - Converting Adapters
WEST BIKING Road Bike Clipless Pedal SPD Cleats Adjust Plate Shoes Adapter White | eBay