Tubs

I think most of the hype was for improved toughness. While being a little faster.

Alough I commuted on 19mm records untill the carcass showed through without a single puncture. So YMMV.

Bet Cronos or Records are still faster than these new ones.

What is faster? Slower, of course, are unround or ill-balanced or poorly mounted tyres... overly narrow tyres on rough surfaces, tyres with poor grip and ,.. Filling a good tyre with a load of goop slows things.. But I'd be really hard put to believe anyone who thinks that on a good road a 23mm Veloflex Carbon is faster than a 23mm Vittoria Cora CX or a 23mm Continental Competition or ... In something like a mountain TT, of course, there are "faster" tyres.. These just trade weight for robustness.. Some track tyres make good single race tyres here but are slower than slow on the road--- nothing to slow down a rider than a defect. That is why fast tyres in Spring classics are FMB PRs, Continental Compeition ProTection, Vittoria Pavés ... and fast tyres in TT stages of the grand tours are Continental Tempos, Podiums and Sonderklasses.. Vittoria Cronos, Veloflex Records, ...