I use them almost exclusively on most of my bikes, and haven't had a front flat in years. I've used mostly Continental Sprinters and Competitions but also Vittoria Corsa EVO CX. The most cost effective is the Conti Sprinter, which I've found for under $40 on eBay and you can get them for $48 here >>> http://www.worldclasscycles.com/tubular_tires_only.htm There are some super duty tires you can buy like the Vittoria Corsa EVO CG Pave, which are both wider and have more puncture protection.