Tonight I tried a workout on the trainer that I included an interval for Zone 7 power which at my current FTP puts me holding 320W+ for that particular interval. However, I ran into an issue and ultimately had to bail on that particular interval. When I started into that interval, my tire started spinning out quite a bit on the trainer so there was a whole lot of extra effort trying to hold that level. I was able to do so for the first three such intervals, but the last two I just could not do it. It spins out some in Zone 6, but I can manage it. I never tried a Zone 7 interval until tonight. I have never used a trainer tire before, but I am wondering if that is something that would help? I use a Kurt Kinetic trainer and the roller is in good contact with the tire. I usually turn the tension know two full turns from first contact with the tire. Having never encountered this issue before I am at a loss as to how to address it or if it can be.