I would choose to cut the two inner rings I think, so you hava a protective edge against sharp rocks, pebbles and stuff. Nope, 3.8 mashers is what I´m planning to use. :)
Hmm, I am curieus to see pictures of that!
If you see the Traxxas wheels, they don't have the outer ring, but the inner only, so I would cut the outer ring?
Otherwise the tire will be sitting trange on the outer bead?
Do you have a link or a part number for those wheels?