The set I used was new when I got there. I ran 2 tanks practice and all the races with them and I think I could get another day out of them. Sp far Ive only bought softs. Most guys at the track with mediums dont seem to like them a whole lot. Ive read that harder compounds work better when its really hot and it hasnt been hot yet this year.
A bunch of people have told me the Crossbraces are even better than the City Blocks. I plan to try them at the next race at the Tiltyard.
I dont have any I-Beams. I might try a set at some point but never really liked Bowtie style tires.