Hubnut
1/2 ton status
Okay. I am a moron about tire width and the required rim size. I have steel wheels from a CUCV (I think they are 7 inches wide). What is the widest tire I can put on this rim?
CK5
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Need schooling on rim width/tire size
- Thread starter Hubnut
- Start date
You will get a ton of different answers depending on who you ask. You can often run a much wider tire than what is generally thought to be acceptable. A common 12.5 width would be just fine.
Hubnut
1/2 ton status
So, no real formula or something?
dfl701
1/2 ton status
Not really. I ran a 35x12.5 on a stock 96 chevy rim no problems
randycj7
1/2 ton status
If you go to Super swampers web site and look at the different tires in there specs they list what they recommend for rim widths.
Croatan_Kid
Registered Member
The stock rims on a CUCV are 16x6 IIRC. I wouldn't exactly have warm fuzzies about running 12.50s on them, but 10s would be just fine.
I've often times heard no more than 4" wider than the rim.
I've often times heard no more than 4" wider than the rim.
ragedracer
1/2 ton status
I've seen 14" wide super swampers run on 8" wide wheels with no problems.
I just picked up a set of 35x15.5 and mounted them up on the stock 8 inch rallies. They were previously mounted on a 7.5 wide rim.
randycj7
1/2 ton status
It will work for sure just not the best. I just finished up a Jeep for someone where I mounted a set of 44x19.5inch boggers on a set of hummer rims which are only 8.75 wide. They just look a lot more baloney.
carpeonnel
1/2 ton status
Isn't the rule of thumb something like wheel should be no more than 3in narrower and no more than 2in wider
There are a lot of variables involved, plus the difference of whether it "will work" vs. "optimal" size.
Generally the taller the tire, more specifically the more sidewall height, allows you to get away with a narrower rims. Some good examples:
44x19.5 Bogger : using the idea of the rim needs to be within 2" or 3" of tire width that means you need to have a 15-16" wide rim. There a tons of people running this size tire on stock H1 rims that are 8.25" wide, and even more using 10-12" wide rims with no issues. Of course the H1 crowd is mainly off-road.
On the other had, take a really low profile tire on a 20" rim that is only 26" tall and you need to have the rim pretty close to the same width of the tire. If the sidewall is only 3" tall you can't have a rim that's 4" narrower.
Generally the taller the tire, more specifically the more sidewall height, allows you to get away with a narrower rims. Some good examples:
44x19.5 Bogger : using the idea of the rim needs to be within 2" or 3" of tire width that means you need to have a 15-16" wide rim. There a tons of people running this size tire on stock H1 rims that are 8.25" wide, and even more using 10-12" wide rims with no issues. Of course the H1 crowd is mainly off-road.
On the other had, take a really low profile tire on a 20" rim that is only 26" tall and you need to have the rim pretty close to the same width of the tire. If the sidewall is only 3" tall you can't have a rim that's 4" narrower.
