My buddy and I recently obtained a CR85 that we want to use for mini racing. We bought 12 inch rims for it, I've already laced them, but now I'm wondering if we should have bought wheels so that we don't have to worry about tubes and spokes... Also, what are the best tires to run on the 85? I'm seeing multiple people running 110 fronts and 120 rears. Wouldn't a smaller tire make more sense? Like a 90 front and 110 rear? Thanks in advance.