Monster Truck Slicks!
 

Well, my Monster is at Crazy Dave's still, but will be shipped out Monday, so I should have it bakc to test this. I got in a set of Mini-Z aluminum wheels for my brushless xmod (verrrrry purdy wheels), and swapped the hard tires they came with for a set of 30s front, 40s back (slicks). Well, I put down the stock tires down next to a set of monster tires, looked at it for a second, then compared the two, and they look to be the same diameter! When I get mine back, I'll know for sure, but I'm pretty sure!