This is for people who track hence the thread name. Tires are about 40% cheaper in 18” and one of the single biggest track costs, wheels and tires are lighter probably around 30-35 lbs less overall, you can run any of the 200tw track compounds or any of the slicks you want that aren’t available in 20”.
On bigger wheels and handling, that’s because oem general purpose tires have soft sidewalls for comfort and bigger wheels have shorter sidewalls. That doesn’t mean they’re faster on track than track tires.
