Just to add to my previous post, I've now got some mileage on a pair of Pirelli P-Zero Race TLR in 30mm width. I have to say they are a very nice ride and easy to fit and seat. No flats yet, but still early days. I'm planning to swap back and forth between these and my 32 mm Pirelli Cinturatos over the next year. The 30 mm P-Zero is a better fit on my relatively narrow Giant SLR 1 rims (17 mm internal). The Cinturatos look much wider than the 2 mm difference would suggest. So I would probably get 28 mm Cinturatos next time, but it's not a big deal. I'm really impressed with these new Pirelli TLR tyres so far.