20 x 2.40 front 20 x 2.30 back

Get something smaller unless your riding is 1 mile and hour beside foot tall ledges

Run Fireballs like that . 4 front , 3 back . Keeps things fat and comfy but the back has the extra clearance when landings get rough .

Deharts are weird. The inflated width on the big one is 2.42, and the small one is like 2.36, so they are essentially the same size.

Donnasqueaks are very similar, and come 2.44/2.28, which is a lot better. I don't ride them (yet) though, so I can't really comment on how good they are. I want to try them, but I have a shitload of tires sitting around and really feel like I should sell/use up some of those before I buy more tires.

You can ride fast shit with big tires. It's not really the size of the tires that makes them slow, but the weight. Donnasqueaks and the regular Deharts (not slicks) are pretty reasonable weight wise.

Tecnic is right, it's not the width, but the weight of the tire. I ride plenty fast with my 2.4/2.25 Donnasqueek setup, I like so much so that I'll probably switch to dual 2.4s when these wear out.

I run 2.4 front and back and haul ass through town every day. Fat tires feel good to me.

I'm gonna get donnasqueaks 2.4 front and 2.25 rear, my friend just got them and they're really fast,spongy and ridiculously grippy (we have plastic rhino ramps that slip and they grippy to them)