I have a set of Vittoria Corsa Control G+ Isotech Tubular Tyres - 700c x 30 tubulars purchased in January and waiting to be glued. I believe that was the widest size in that tyre. I would've preferred 28, but this was too good a deal to pass up.

Seems to be discontinued at the retailer I purchased from-- https://www.merlincycles.com/en-us/v...0c-106033.html