Hot on the heels of learning that Standard was debuting an OS20 125r, we find out that legendary frame builder Gary Turner is also testing an OS20 prototype with a 22″ top tube!

With GT already having a complete in the market (the Pro Series XXL OS20), the just-released Standard OS20 125r and smaller “artisan” brands like Stout and Indust producing custom OS20 frame and forks…this wheel size is finally (after its introduction almost four years ago) starting to develop some momentum.