You will notice a great difference with the 1 1/2" tires. Performance Bike sells the Forte brand for about $13 and you can catch them on sale for about $6. I put a pair of these (and new tubes & rim strips) on my Trek Navigator and I immediately felt like I could double my endurance!!!! I am going to ride next Saturday on the Great Greenway Tour 2007 - July 28, 2007. My plan was to do half a century, but now I am going to see if the ol' bod can do more!

http://www.delgreenways.org/Events/2...and_events.htm