30 min+5 laps all depends on the speed. It's usually about 12 miles, give or take a few. On the tires, you want to use 700*23, and fill them up to the max recomended pressure on the tire. I dont know anything about those tires, but they should be fine. I've done sevral races on cheapy training Serfas tires that cost 19 bucks, so those should work ok.