Yea, I had assumed thunders used a different alloy. There is a very clear difference in the hanger alloy between indy, venture, and ace classics. The AF1s are closer to indy feel. I only caught a couple grinds on my thunders before it started raining yesterday, and i was pleasantly surprised, they felt good. Everything felt comfortable on the thunders right away, and I'm able to have a slightly wider stance now, which is what i was looking for. Def gonna rock these for a while, zero complaints so far, and that says a lot coming from someone with my level of madness. I guess they were squeaking a little, but if i stay on these ill just get some riptide cups to fix that.