Join Date: Jun 2004
Location: Northern Nevada
Tires are changeable. On the same set of wheels, I've ridden thousands of miles on tires from 23 to 41mm, with no troubles ever. Buy a bike you like and swap tires if necessary.
As for what you SHOULD ride, opinions vary, but everyone who disagrees with me is wrong... Seriously, I weigh 240, and I wouldn't ride anything smaller than 32s. To a degree that's a matter of personal choice, but I've been riding semi-seriously since college in the '70s, and I've found no advantage to hard, skinny tires. Most of my riding these days is on 700x35 Panaracer Paselas.