19.5" Wheels & Commercial Tires on a F-250/F-350?

[warrenpouyer]

I have seen a advertisement for a company that has 19.5" aftermarket wheels to bolt right onto Superduties, But I can't find them again to contact them and ask questions...

Does anyone out there have this size wheel & the commercial tires mounted on them?

If so, What do they ride & handle like?

Did you choose to include any brake upgrades since the stock brakes
are marginal at best?

Thanks

[delete]

I just sold my 2001 F450 and bought a 2004 F350. F450 need new rubber....At $250-300 each.
Good Luck with your selection.

[uardrail22]

keep in mind that 19-1/2" on a unit with a 3.73 rear axle will now have an equivalent 3.20 rear end ratio.

to get this back to 3.73, the 19's need a 4.20 rear end gear

[Seabee1]

Maybe I miss understood what you were saying but wheel size doesn't matter. Its the overall tire diameter the changes your gear ratio. I have 35's on my truck and I think its better than factory 265/70's. With stock 3.73's it will still burn em off and it gets better gas mileage on the highway now.

[ThomasT`]

Put down the crack pipe and step away... 225/70/19.5's range in height from 31.8" to 32.6" tall. Stock size 265/75/16's range in height from 31.54" to 31.9" tall. So you see your figures are off quite a bit...

You would have to move to a 285/70/19.5” tire to even get close to the figures you posted… Example: old tire 31.54” new tire 35.4” gives you a corrected gear ratio of 3.32. In the example I used the shortest 256/75/16 and the tallest 285/70/19.5.

One more thing... 225/70/19.5's range from $143.77 to $248.97 (Michelin)right off the Rickson web site

[guardrail22]

true but I would never put something as narrow as a 225 on a truck like an F250

I had 235's on my F150. I was basing my numbers on 285's for both 16 and 19-1/2

I also didn't have the spredsheet right in front of me so I was winging it - the point being that larger wheels = larger overall diameter = lower effective rear end ratio.

[ThomasT]

You wouldn't put 225's on a F250..? Ok, but Ford puts them on the F450-550

[darai]

Ford only puts the 225/70R19.5 on the rear drives in dual form only. Their F450/550 all have duals in the rear. Even if the tires could take the weight as a single rear drive, I would think you would have brake problems (might lock up too fast), and shortened tire life due to such reduced thin tires. The difference between the 265/75R16 (Stock tires) and the 225/70R19.5 is 40 mm of tread width which translated into 15% less rubber on the ground.

I would at least go with a 245/70R19.5 as a minimum. At least you would have the same tread width as a Dodge 2500. The lower profile will give you less bounce and 19.5 inch rims are sweet. It might sit slightly taller which would yield a slightly slower takeoff, but would give an agressive wedge look to the truck if you keep the stock tires up front.
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