Which Tubs?

In fact, there's not a single continental tubular I'd reccommend over anything else at any level. Riders at top level in the UK tend to use Vittoria pista Evo CS.

Evos are great value for a competition tire but totally ill-suited as a general purpose tire-- and totally out of place for training. They are very fragile and extremely fast wearing--- at the elite level, of course, none of these arguments are of any relevance as tire cost is, more or less, irrelevant. On anything but a good track the Evos are out of place--- at at a high level there are much better tires to be had.

Some like the sonderclasse for endurance training, but that's because of durability.

Durability is an issue.