I distroyed a vitoria tire on my trainer after 120 minutes a month or so ago... now I will not even touch the nice tires on the trainer. I use these hard cheep specilized tri sport tires on my training wheelset and they have lasted forever. I actually use a slightly different cassette (a 12-27 on the road wheels and a 12-25 on the training set with no problems. BTW I race the 12-27 but I will be going with a 11-21 racing duraace cassette to race with when I go 10 speed fully and a few ultegra 10 cassettes for the normal wheelsets...