I have two/2 IRC Trail Winners; one is 5.10S18/GP-110R and the other is 3.00S21/GP-110F that still have some useful tread on them. They were on my ole '81 XT500 when I got it last July ('08). The bike had been sitting for the previous 5-6 years (inside a shed). There doesn't appear to be any weather checking on them. I just changed them because I thought the tire compound was a bit hard, but otherwise, there is still around a 1/4 inch of tread still there. I can bring them to the rally on Saturday (9/19/09) for you to look at if someone can use them. If someone else needs/wants them, then PM me and we can set something up. Would prefer local pick up, otherwise it will cost you for shipping. The price...nada, zip, zilch, free!!! They're just sitting around here collecting dust and someone should get some use out of them if you can, especially if it will help keep a fellow rider on the road or enable him to get back on the road. Let me know.