Compression Ignition Addict
Join Date: Apr 2010
Location: Las Vegas Baby!!
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I'm not the sharpest knife in the drawer so I had to read your post a few times to understand some of the content. I'll do my best to answer what I can though.
First off, WELCOME to the forum and congrats on your new F450 Ford!!
I was not aware that any other axle ratio was available for the F450 except 430?? Not sure where you got 488s unless you are speaking of a F550 or larger?? I have not looked at what those trucks offer.
As far as wheels go, , , they will not make a lot of difference on pulling power. The diameter of the tires do. If you had 34 inch tires on 17 wheels OR 34 inch tires on 22 wheels, the truck would not notice any difference in pulling power as the final ratio is the same on both set-ups. Your point about sidewall aspect is true however and would effect handling. Also remember that larger diameter tires from stock will impact braking, , , probably more than they will effect pulling power on an F450.
I pull a 16,500 lb 5er with my 450 and it has plenty more than that. The loads you mention are cake for your truck so I guess your biggest question could be answered by a good tire man about off-roading 19.5s. All of those I have seen are for hiway heavy loads. I think they are made with all season grip tread too but that is still not the same as off-road would be.
Off -road could mean different things to different people too. Here in the desert, our power line roads are rock and sand and tires need to be durable and not so important on rough tread for grip. Where I grew up in Missouri, grip was everything in the deep mud but durability was secondary in the soft mud. Your best answers for tires is right at the tire store. I,m sure some of the guys around here have tried off-roading the F450 and may have opinions to help with tires too.
I think a 9000 lb. truck off-road would be a pig. I know the fire fighters do it though so it can be done. I also believe taller tires for clearance would be much better than a lift would?? Nothing worse than a top heavy pig on the side of a hill.
2012 F450 Ultimate Lariat pkg, 4X4, FX4, 5th wheel prep, camper pkg, 40console40 seat, Ingot Silver and Black guts
Reese Elite 18k 5th wheel
DuraFlap flaps all 4 corners
60 gal aux tank in bed
7.4 mpg as shown @ 70mph and 25740 lbs gross!!
2012 Fuzion FZ310 Monster Edition Toy Hauler 12,500 dry 16,500 loaded to play. 3100/3500 pin weight
Breast feeding is a hard habit to quit