I am really glad that you all mentioned the trainer on tire effect. I would've had to find out the hard way (as you all have) so THANKS!!!

The cheapest I have been able to find the GP4000's are on www.biketiresdirect.com , and they will be about $89 shipping included. Is that about right? They seem to be cheaper there than on performancebike.com or anywhere else, but maybe there is a better place to look?

Wish they were free.