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1990 Dodge tire sizes

J

JimS

Member
I have a 1990 Dodge 4wd diesel 250 that currently has 8 bolt 33x12.50 R16.5 on the truck. I have some used 315/75 R16 and would like to know if these will fit without interfering? The look awfully close. The truck has not been raised. If not, what tire size may I put on these rims that are sporting the 315/75s that will fit?
 
They're slightly narrower and only an inch larger radius, and Dodge has LARGE wheel wells, so it's hard to imagine they wouldn't fit, 'course we don't know the difference (if any) in wheel "offset".

Guess you'll have to "think out of the box", here, and give it a try!
 
16 inch tires will NOT fit on a 16.5 rim. The father of a friend tried forcing a 16" tire on a 16.5" rim and it blew up, killing him.

Jim
 
(quoted from post at 22:52:32 02/04/18) 16 inch tires will NOT fit on a 16.5 rim. The father of a friend tried forcing a 16" tire on a 16.5" rim and it blew up, killing him.

Jim
Click to expand...

If I understand the original post correctly, there was NO mention of putting 16" tires on a 16.5" rim.

And I certainly didn't suggest it.

It seemed the 16'' tires are already mounted on 16" rims that will fit the bolt pattern of the truck.

Are you seeing something I missed?
 
16 inch tires on 16 inch rims. Someone gave me some nice 16 inch rims with 315/75 R16s on them Previously mounted on the
vehicle were 33x12.50 R16.5. I was curious if anyone had enough experience or some of the tire folks here could tell me if the
315s will clear my fenders?
 
I have a '92 Dodge D250 CTD and am running 33x12.5x16.5 on the back. There is gobbs of clearance around them. I also had a '72 W100 and just had to trim the front fenders a little, at the lower front and rear, to run Q78-15 Buckshot Mudders (appx. 36") on it.
 
Here's a novel approach: 10 minutes with a jack and an impact wrench, and you can install one or two of them to see if there's going to be any interference. Make sure you put the full weight of the truck on the tires so the suspension is at ride height before you start checking for clearances.
 
315's won't clear on a turn,especially on a hard turn and the body in a twist like crossing a ditch on an angle. Another thing to check is the rim/tire may rub on the tie rod end depending on the back space on the rim. My 92 with 285's on stock 16" wheels will rub the wheel opening flare on a hard turn
 
(quoted from post at 06:01:01 02/05/18) Here's a novel approach: 10 minutes with a jack and an impact wrench, and you can install one or two of them to see if there's going to be any interference. Make sure you put the full weight of the truck on the tires so the suspension is at ride height before you start checking for clearances.
Click to expand...

Astounding! Before I got to your reply I was thinking the same thing!


Rick
 
Try this on for size:

https://tiresize.com/comparison/


According to them a 315/75/16 would be a little taller and a tiny bit narrower than the 33/12.5/16.5. With the speedo at 70 MPH you would actually be going 73.4.


285/75/16 would be the same height (less than 1% difference) and an 1.25" narrower. With the speedo at 70 MPH you would actually be going 69.6 MPH.


I looked at a Ford F350 that has the 33/12.5/16.5 tires on it - those tires are expensive and getting good load bearing tires is even more expensive. Best thing you can do is what you have planned.
 
Just curious. Why the big tires? My 92 Dodge 4WD diesel has the OEM 235/85-16" I tried 33" tires on it once and they were horrible in ice and snow. Mine is extended-cab and long-bed and it likely the highest model there was. Lots of tire clearance. I removed the rear iron spacers to lower it. It was so high I could not get a truck camper on it without spacers under the jacks.
 
We don't get snow here. If I tow anything it is much more stable AND the tires and rims were FREE!
 
(quoted from post at 09:14:08 02/05/18) 315's won't clear on a turn,especially on a hard turn and the body in a twist like crossing a ditch on an angle. Another thing to check is the rim/tire may rub on the tie rod end depending on the back space on the rim. My 92 with 285's on stock 16" wheels will rub the wheel opening flare on a hard turn
Click to expand...

Bingo!
Depending on the rim offset, the tires may touch something at some point or they might clear everything.
In the front.
Should be plenty of room on back axle.
At least put the fronts on and try them out long enough to decide before putting the rears on.
 
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