I run Zipp disc in the back and 808 tubular in the front. Those Continental tires are not bad at all. They are pretty durable. I'm so scared of getting a flat, so I use Gatorskin. Heavy and rolling resistance is bad, but they are pretty durable. I also added sealant in there too. Anyway, I usually put 100-110 psi and it's been working well. I put 90 once and I was slower. I need to get new tires soon and I'm debating Vittoria Speed G+ or Continental Competition. I rather have durable tires than faster but weak tires. If you check reviews on Vittoria tubular tires, people are unhappy because they get a flat too often.