I've never understood why all series can't run the same tires. I'd think that would lower the cost of production and in turn retail prices. It would also allow more used tire sales to lower budget teams. Is there any real reason nonwing needs to run different tires than wing? 305, 360, 410? Currently it's a pain in the rear for teams that run different series. You have to have different tires for each. I'd be happy with a medium RR and D15 LR for all.

Fender cars are even worse I think.