Quill to Threadless Stem Adapter – 22.2 mm / 28.6 mm

This adapter lets you run a modern threadless stem on a bike with a threaded fork. The bottom section (22.2 mm) slides into the steerer tube like a standard quill stem and locks in place with its expander wedge. The top section (28.6 mm, 1-1/8") accepts any standard threadless stem. You get access to today’s wide range of stems and handlebars, and it’s easy to dial in your fit on vintage or touring bikes.

• Bottom (steerer insert): 22.2 mm
• Top (stem clamp): 28.6 mm (1-1/8")
• Compatible with threaded forks and standard threadless stems