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I'm currently running the OEM tires, LT275/70R18/E. I want to replace them because being as old as they are I'm concerned I'm going to have a blow out with the 5vr connected up and it will likely happen when I'm in the middle of no-where.

I'd like to get something a little larger to look good and fill in the well but I don't want to sacrifice handling or control. My priority is to safely travel down the road with my wife's 36' coach.

Anyone have any experience or recommendations?

Cheers

Bill
 

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A 285/70R18 would be just slightly larger and a good fit, problem is the only tires I've seen in that size are mud terrain type. Not ideal for long towing and all weather conditions.

If you dropped down to a 17in wheel, then your tire size choices would go up considerably.

Harry
 
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Stuck in Commiefornia...
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I ran 35x12.50-18s on the stock wheels on my '05 very successfully, and on my Early 1999 with the '05+ axle and suspension swap I continue to run stock 2005 18" XLT aluminum 8-hole wheels with that size tire.

Being its a 4wd (has to be to have come with 275/70-18s) you have a massive selection of tires available to you. With such a large trailer and a single rear wheel truck, several of the tire options offer increased load carrying capacity too.

Toyo offers the Open Country A/T II All-Terrain in a 285/75-18 (35x11.50-18) Load E 129/126 sizing, it's load capacity is 3900lbs per tire in a single wheel application, up from 3640lb for the stock size tire and Mac 80psi cold pressure.

Nitto offers the Dura-Grappler which is more a highway rib tire in a 305/70-18 Load E 127/124 sizing with a 3750lbs per tire capacity and max 80psi.

The Toyo Open Country Mud Terrain that I run in 35x12.50-18 is Load E 123/121 with 3415lbs per tire capacity and max 65psi. They are just wide enough that the side lugs of the tread scuff the paint off the radius arms mounted on the stock wheels.

With the trailer you run, both of those LT Metric sizes are good choices, even though they are taller than stock by 2". Running the 285/75 or 305/70 at 65-70 psi front and 55-60 psi rear will net good wear and ride and the tire will not be under-inflated even when towing. I run 50psi front and 45psi rear, and ride quality is excellent on the larger floatation size. My 5er is only 30 feet, and max weight is 11,500lbs though, so I'm not quite as heavy as your rig. When I scaled my '05, the axle weights on a 20,000lb total combined were F:5,500 R:5,500 T: 9,000 and it towed great. The only thing I learned on my first big trip with that rig was to run lower pressure in the rear tires of the truck, I centered them out in about 9,000 miles of towing and still had 20,000 miles in the front tires.(I get 65-70k from the Toyo M/Ts).

Hope this helps.


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Stuck in Commiefornia...
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Previous truck:
ImageUploadedByAG Free1433353836.243747.jpg

Current truck: ImageUploadedByAG Free1433353865.869792.jpg

Don't have a picture of either with the Prowler in tow.


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I have Wild Peak A/Ts on a company work truck and they ride great and were decently priced I know they are 18s but I will have to double check on the size but I believe they are 285s
 
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