F250 Rear Axle Weight Rating with 20" wheels

As far as the difference in diameter, I'm no too concerned about the effect on gearing as much as the height of the box and roof. I only have 82" in my garage door opening plus the 5th already sits about 1/2-1" high in front with my F150. That only gives me 5-6" clearance with the 57" high box (unloaded), 55" loaded. So, if an F350 with 20's is closer to 60" box height, it's going to be a problem.

I could probably get by with 17's or 18's but if I make the truck swap, I'd rather not go from maxed out axle right to maxed out tires.

Trucks like yours should get a premium resale, since they are almost nonexistent.

One thing to keep in mind, when getting the 20" tires and wheels is height. They are about 3"s taller than my standards, and will take away from your gearing.

It will make a difference in load cap however. If you are thinking 6.2, I would suggest the 4.30 gears, with the 20"ers. It will be hard to find 4.30s used.

If you are thinking 6.7, in a 250, it may not have much more payload than you have now.

Just a few things to think about,
Jerry

Thanks, yes, moving up is a possibility. If I do, I just want to make sure I have the highest ratings possible in a SRW. It's a tough call because I like everything about my current truck... power, quiet, handling but that maxed out semi floating axle is still on my mind. Odds are that it would be OK but if I can trade or sell without losing a lot, I'll move on.

I special ordered my 13 250 with the HD service suspension. It has 4 rear springs, and heavier front coils.

I did want the standard tires, and because of this my sticker shows 6200. My tires 245/17 are rated at 3195.

Are you thinking of moving up from the buck 50?

Jerry

Add the additional leaf springs and taller blocks and you have a 350 rear end.