My bike was a project/found bike, so I wasn't very excited about spending many $$ on tires that might end up being on a frame destined for the junk heap...again. Cheng shin carries the cheapest tires I was able to find, after going through all of the threads on tires and looking at the FAQ's (which I would recommend you do as well). I put around 2000 miles on these tires this summer, with no complaints thus far. I plan to switch to a better grade of tire this winter, but can't gripe about these at all. I've been told that the primary diference is compostion and wear.
hope this helps,
hym