The Stovebolt Site Forums The Parking Lot Big Bolts Largest tire for stock rims?

I'm needing some advice. I've searched the forum for the better part of a week and the internet for longer, I believe I'm needing to replace all my tires as they are badly weather checked/cracked. I currently have 8.25-20 on the drivers and 9.00-20 on the steer axle. I have enough 10.00-20 in good shape that I had for my International Harvester project that I'm no longer going to use on it. Would they fit the stock rims? Below is what I've been able to find on the data plates as well as pics of the current setup. I was able to clean off several layers of paint from one of the rims as well. Not sure what the stamping means, but from my research, I believe these not to be the dread "widowmakers", am I correct? Any and all help would be greatly appreciated

Model - HC 451
Serial - 5961
Engine - 270
Transmission - Clark
Front Axle - F460
Rear Axle - Eaton TSDP 16600
Axle Ratio - 6.50-9.04
# of Springs: Front 11, Rear 10, Aux 6
Wheels - Motor
Studs - G

correct, those are NOT the "widow maker" or Firestone RH-5 rims.

Looks like a 6.50" - 7.00" width, I think it'll be fine with 10.00-20. I'm running 10R-22.5's on my original wheels and they don't bulge, they look correct.

My 52 model 470 series COE has 10.00 20s all around.

Thanks. Good to know.

I plan on working my truck around my property. In your opinion, would there or could there be any issues this the larger tires when loaded?

That is a sharp ride. Quick question, the four brackets that are on the door, where those mirror brackets? Mine has hole in the same location, but no brackets. Thanks

Saw Mill : One thing to look out for is if the fronts will rub when turning sharp. My 7.50s do a little.

I plan on working my truck around my property. In your opinion, would there or could there be any issues this the larger tires when loaded?[/quote]
I work mine, nothing real heavy, had 110 bales of hay on it, and didn't even think about tire trouble. The steer tires are smaller metrics so they don't hit any sheet metal. What type of body does your truck have on the rear?

Just to keep things in prospective your 10R-22.5 is NOT the same size as a 10.00-20, it's actually the same size as a 9.00-20. A 10.00-20 is a big tire compared to a 8.25-20.

Mike B

thanks for the advise. i'll keep it in mind

78Buckshot-

It's a dump truck

With the dump body and that much clearance you can go big on the rears.

Saw Mill: One plus with the 10.00-20 tires is your top end speed will increase at least 5 MPH for any road trips, but a little less gear in the mud.

Mike B, thank you for reminding me of the size comparison.

Curious, are you running tubes with your tires? Still new to the whole tube vs tubeless game for trucks. Thanks again

All 20" rims are multi piece tube type.

All 22.5 rims are one piece tubeless type.

The tires are not interchangeable between these two rim sizes, but they can be run side by side if you match there diameters correctly.

7.50-20 has the same diameter as the 8.25-22.5

8.25-20 has the same diameter as the 9.00-22.5

9.00-20 has the same diameter as the 10.00-22.5

10.00-20 has the same diameter as the 11.00-22.5

Mike B

Thanks for the comparison. It's very helpful

Saw Mill My 8.25's rub on a tight turn but not a problem so far,have changed a lot of 10.00 20',s easy on clean wheels.