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View Full Version : Max size for 15" tire on 10.5 wheel


thelal
09-24-2010, 06:56 PM
I've 31" tires on 15x10.5 rims (trailer = old 1980 toyota pickup bed) and want to try and goto 33" or 35"

Can I get those that will fit the 10.5 rim or will I have to go for a different (rim size)?

Thanks

RedCreeper
09-24-2010, 07:37 PM
they make them. BFG and Goodyear have them and plenty of other brands in both 33 and 35. just depends on what you want and want to do or use them for. I like BFG and know there is a 35 12.5x15.

Chris
09-24-2010, 07:45 PM
I have 35x12.5x15 on my truck with 10" wide rims, no problems.

nuclearlemon
09-24-2010, 07:52 PM
width and/or how dorky it looks will be your biggest issues. twenty years ago, people were running 44x14.5 tires on 15" rims and it looked stupid. figure 14.5 to be about the widest if you will need to air down, but i have 12.5s on 5.5 for rollers (wouldn't dare drive on them), so fitting isn't the issue. ;)

thelal
09-25-2010, 01:03 PM
awh.. interesting to know you can 'squeeze' wider tires onto 10.5 rims.
Cool, I'll go looking for 35x12.5x15 then

or anyone know some -'gonna get rid of them' - only for a trailer so don't need to be in great shape (need 3)

Brendan

Red_Chili
09-25-2010, 06:45 PM
I have a Bigfoot MT you can have for a bottle of Forty Creek Canadian. 10.5 is actually optimum for 12.5 tires.

thelal
09-26-2010, 11:48 PM
Bill - you got one or two or 3?
Not that I'd know what a Canadian would go for!

Red_Chili
09-27-2010, 12:40 PM
Just the one. A six pack or... whatever.

Dr. Schlegs
09-27-2010, 01:14 PM
Forty Creek Canadian?? How did you ever acquire a taste for that?:D

AxleIke
09-27-2010, 01:30 PM
Personally I like a narrow wheel. IMO, the tire looks a lot better on the wheel, and you hold the bead better aired down.

Obviously, Bill runs beadlocks which is the real solution, but as a bandaid, an 8" wheel will hold a 12.5 tire quite nicely.

I'm running a 7" on a 35x12.5, and its nice, but you cannot get them mounted at most tire stores, have to go to a good-old-boy tire store where they aren't shackled by fear of lawsuits.

RedCreeper
09-27-2010, 02:50 PM
i am running my 35 12.5 on 8in rims. Did it to give me a little bigger bulge to protect the rim. Looks beefy to.

RedCreeper
09-27-2010, 02:52 PM
I have my spare in the garage if you need to see it in person.

Hulk
09-27-2010, 03:18 PM
Personally I like a narrow wheel. IMO, the tire looks a lot better on the wheel, and you hold the bead better aired down.

Obviously, Bill runs beadlocks which is the real solution, but as a bandaid, an 8" wheel will hold a 12.5 tire quite nicely.

I'm running a 7" on a 35x12.5, and its nice, but you cannot get them mounted at most tire stores, have to go to a good-old-boy tire store where they aren't shackled by fear of lawsuits.

I'm running 33 x 10.50 on a 6.5" wheel on my 40.

thelal
09-28-2010, 11:07 AM
Just the one....

Bill, Thanks for that but I'll need 3 (2 under trailer and one spare)
so I'll do a separate Wanted post for those

DaveInDenver
09-28-2010, 11:18 AM
I'm running 33 x 10.50 on a 6.5" wheel on my 40.
That's marginal, usually they recommend 7" as the min rim width. Similar to a 12.50" on an 8" rim in that it's just under the minimum. I think the 12.50 on a 7" is pretty narrow and probably unsafe for long term. I'd have thought a 12.50" wide tire would be right-on for a 10.5" rim, though.

There are a few reasons for the rim width range, but the important one is that when you go narrower or wider than the design range you change where on the sidewall the tire flexes, essentially duplicating running over or under inflated, which wears them out faster. You can adjust with pressure and there is some margin of safety designed in, so 0.5" either way is probably not all that unsafe, but personally that's about as far as I would push it.

We also run our tires aired down and I wouldn't bet against tires designed (unofficially) for off highway use have stronger sidewalls because of it. Thus they can tolerate being mounted a little beyond their recommended range safely, although it probably still does accelerate their wear. That also happens regardless of the sidewall situation because the tread is going to wear unevenly if you're outside the recommended rim width.

BTW, Roger Brown has talked about this w.r.t. 33x9.50 and 33x10.50 BFG tires on stock mini truck rims.

http://www.4crawler.com/4x4/BFG_AT_KO.shtml

thelal
08-24-2011, 07:23 PM
I'm not finding much (on the cheaper side) out there for sale in a 35" (or larger) on 15 rims.

I could go 16" (as have put my R16 (for my 80) Simex JT II's under there and look rather beefy :) but then I'll need to put on flares (none at moment) as these will be pushed out a bit

I've approx 7.5" (with current older 31" tires) of clearance to outside (body) of wheel-well and 11.5" if tire can fit into wheel-well; so methinks I can go higher than 35" if I can find a tall, skinny tires.


Problem this is only for offroad/camping trailer and don't want to plonk down cash for 'new' tires that will only see pavement maybe 10 times a year.


(maybe I'll just stick my Simex on and be done ?)

Red72FJ40
08-25-2011, 08:38 AM
Do a search on CL in the auto parts section. I see the 33x12.5 there all the time in varying conditions and prices.

TIMZTOY
08-25-2011, 02:22 PM
If it Fits, it Ships... muwahahahaha :lmao: