My Raleigh redux 1 came with Schwalbe Big Bens with K-guard. It looks like a mountain bike tire shaved down to a slick but still has treads, kinda like directional car treads I guess. Good commuter tire, absorbs a lot of road shocks and seems to have little rolling resistance. I keep mine topped off close to 70psi. The K guard I believe is Kevlar for puncture protection. I went the extra mile and put tire liner in both tires. Don't know if its overkill, but I haven't had a flat for months. Check out the Schwalbe website its very informative.