1" Inch Threaded Stem Mini Caster Wheel 62 Lbs Load TPE Elastic Rubber Wheel – VXB Ball Bearings
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Quill Stem adapter to 1 1/8" - Technical Q&A - Bike Hub
Quill stem measures 1 inch exactly. I'm guessing the fork is a 1 1/8" threaded. What headset do I need? Also does anyone make 1" Threadless adapters? : r/xbiking