Hutchinson Tempo 2 tires, my favorite dirt cheap sewup, is on sale for $14.99 at Nashbar at this very moment:
<http://www.nashbar.com/profile.cfm?category=121&subcategory=1193&brand=&sku =6285&storetype=&estoreid=&pagename=>
Should that link not work, choose <tires>, <tubulars tires>, <Tempo 2> from their category list.
Gum sidewalls, black finely ribbed tread, and I have had no issues with roundness. Listed as 21mm, I suspect they are a bit larger and certainly "ride larger" as any sewup should compared to a clincher. I probably have > 10 wheelsets wearing either the Tempo 2 (ribbed) or Tempo 1 (crosshatched).
Charlie Young
Honey Brook, PA