Amazon.com : LERWAY Bike Stem Riser Extender MTB Handlebar Stem Adapter with Hex Key for 1-1/8" 28.6mm Fork Aluminum Black : Bike Stems And Parts : Sports & Outdoors
Quill Stem Mounting Bracket Adapter (7/8" and 1" option for cruisers o – Mac Ride
Origin8 Mountain Bike Quill Stem Adapter 22.2/28.6 - Battlefield Outdoors