Originally Posted by Panthers007

The width should be enough to cover, with room to spare, every single spoke. You want, if need be, to have it wider then needed - NOT thinner.

You must have misunderstood the guy at the LBS. Velox works on any wheel regardless of it being 700C or 27-inch. Or 26-inch for that matter. I just trued/rebuilt wheels for my 3-speed 26" wheels. Used 22mm Velox cloth-tape.