Hi Old Grandad!

Thanks for the reply - my concern is that the "ears" of the stem (in this case, the riser), normally clamp directly to the fork's steer-tube. With the adapter in place, the stem-ears are clamping to a rotating sleeve, apparently, with no direct contact to the actual steer-tube. Doesn't this introduce the danger of turning the handlebars, having the adapter-shim rotate on the steer-tube, and leaving the fork and wheel to continue in their original direction of travel?