Curious if any one has used these tires at the track on a dry day and how well they worked. Basically, I've still got a set on my bike with some life left in them and I'd like to do a couple of the MRA SuperStreet classes this summer. I know they aren't really track day tires, but I'm not trying to win any races and if they will work and be safe I'd like to use them up before putting new tires on. I've only got the one set of wheels so either I use up the PR4s I have on there or I buy new tires, pay for them to be mounted for the summer and a couple track days, and then pay for the PR4s to be put back on later to get the remaining life out of them, not the end of the world but some expenses I'd like to avoid if possible.

Also, anyone know how they judge the "Tread must be at least 50%" requirement? They appear to be at least that to me, but I can't find anywhere online that states the original tread depth on the tires so I can use a gauge to measure what's left and confirm I'm good.

Thanks!