I've sunk so much money into my electric Revo it outweighs the rest of my RC's combined. I started converting it well before the E-Revo came out (before the Revo 3.3 came out, in fact) and have gone through so many set ups and what not it's insane. I do have to say I've recouped a lot selling off the stuff from older setups.
But anyway, I did some searching for tire setups for our much anticipated little beasts, and here is what I came up with.
Stock Tires - 3.25 inches in diameter, 1.8 inches wide.
1/10 Truck Holeshots - 3.8 inches in diameter, 2.2 inches wide.
1/10 Buggy Holeshots - 3.2 inches in diameter, 1.8 inches wide (perfect blue groove track tire - what I'll be using).
1/10 Truck Gladiators - 4 inches in diameter, 2 inches wide.
1/10 Truck Bow Ties - 4 inches diameter, 2 inches wide.
1/10 Truck 30 Series Bow Ties - 3.9 inches diameter, 2.2 inches wide.
1/10 Buggy Bow Ties - 3.5 inches in diameter, 1.9 inches wide.
1/10 Buggy Dirt Hawgs - 3.5 inches diameter, 1.8 inches wide.
1/10 Truck Dirt Hawgs - 4 inches diameter, 2 inches wide.
1/10 Truck 30 Series Dirt Hawgs - 4.1 inches diameter, 2 inches wide.
1/10 Truck Badlands (30 series or standard 2.2) - 5 inches in diameter (too big).
The truck's wheel base is only 7.9 inches long, so if you used 5 inch tires you'd be left with less than 3 inches of space between the tires. I'd be willing to bet the tires can balloon enough to touch.
I think that going anything over about 3.5 inches in size is just too unreasonably large. I think 3.5 is already large as it is. So we pretty much have to stick to the buggy tires until companies come out with tires specifically sized to the truck.
I will personably be sticking with the stock talons for bashing and the 1/10 Buggy Holeshots for the track. I may pick up a set of 1/10 Buggy Dirt Hawgs if the talons prove to have poor traction, but if their anything like the full size talons, they have acceptable grip for bashing.