Joebgd, I have no idea. They wear off in no time flat. I did learn something, though.
I used to always change my own tires, but 2 Winters ago I attempted to change the rear, but gave up. They were either too stiff or I was getting weaker. Brought the wheel and tire to the local bike shop and they did it. Well, I had them do the front tire for me saturday, but didn't have time to get the rear off, (Job), and figured they could do it Monday. Oh, fudge, they're closed Sunday and Monday. Well, I've been working out, so I attempted it on Monday myself. Piece a cake! Thanks to the Sun. I put them on the driveway in the Sun. Nice and warm, and it came off quicker than a new bride's nighty, and went on easy, too! Getting the valve through the hole is still a little tricky.
The Dunlops, handle great. The Avon's were getting a little , (or a lot worn out), so the differrence was night and day. Good luck with yours!