Amberwall Clinchers for Use on a Concrete Track

Just realised it's Veloflex Master I was thinking of, not Record. Just looked up the prices and the Record is too much money.

Master/Corsa are both dirt cheap (well, for a quality race tyre) - £50ish for two from Ribble.

I do TTs on them with Latex tubes. Also surprisingly durable - done century+ rides (loaded with Alpkit seat pack) and also the Tour of the Black Country (gravel, cobbles) and no issues. By far my favourites tyres.