Mounting 12.5 MTs on 15x7 rims?
- Thread starter Fiveo
- Start date
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Depending on the actual section width, you might push the center of the tread up too much on a 7" wheel, thus wearing out the center of the tire before the outer lugs. You might want to look into the manufacturers recommendation. Most companies have a chart listed on their site.
I have seen some mounted on the factory style wheels(on a 4runner) but they did look like balloons on it.
sandcruiser
....back in the saddle again....
I've been told that it will work "just fine"
I've been told that it will crown the tires (wear the center)
I suspect that the abnormal wear would show more on a highway rig and less on an offroad rig.
For me, it is almost a non-issue as tires here almost never survive long enough to actually wear away to nothing-- usually it is catastrophic failure from a hunk of rebar or a nasty root that kills them.
I've been told that it will crown the tires (wear the center)
I suspect that the abnormal wear would show more on a highway rig and less on an offroad rig.
For me, it is almost a non-issue as tires here almost never survive long enough to actually wear away to nothing-- usually it is catastrophic failure from a hunk of rebar or a nasty root that kills them.
- Thread starter
- #5
I dont care about the wear of the tires. They are Procomps I want to replace soon. I have cheesy chrome rims I want off my truck. I found a steal for 4 stock alloys and one steel wheel of $60. I want to go to 33x10.5 to help out the old 3FE. I figured this might be a cheap way to reduce some of the work on the engine in the mean time.
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teejnut
SILVER Star
i have 33x12.5x15 bfg at ko tires on the stock fj80 rim without any issues. here's a pic, tires are air down to about 20-25psi i think? i forget the exactly psi
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Personally, I love that look and it makes the tire a lot harder to come off the bead while running low pressures. I'm running a 14.5" wide tire on an 8" wide wheel...
it must depend on the tire you use, yours do not look like they are bulging out like the ones I saw.
- Thread starter
- #9
i have 33x12.5x15 bfg at ko tires on the stock fj80 rim without any issues. here's a pic, tires are air down to about 20psi i think.
Thanks for the pic! Id be painting the wheels black just like yours. Did you just rattle can or do any prep?
teejnut
SILVER Star
I cleaned up the wheel face as much as possible with simple green. Scrubbed it with a scotchbrite pad. Primered and a few coats of flat black spray paint. Has held up really really well.
- Thread starter
- #11
My plans were to go with a narrow 33x10.5 AT to maximize MPG. But Im wondering how much of a difference there a 33x10.5 AT would make compared to the 33x12.5 MTs on a 7" rim? If the difference was minimal I'd use the cash on a lift instead of tires.
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sandcruiser
....back in the saddle again....
if you have donor tires... do it. The only downside is tire wear (which you don't mind).
as for 10.50vs12.50: you'll save fuel w/ the 10.50 due to less wind and rolling resistance. But you might as well wear out the 12.50 first.
as for 10.50vs12.50: you'll save fuel w/ the 10.50 due to less wind and rolling resistance. But you might as well wear out the 12.50 first.
teejnut
SILVER Star
before the bfg at ko i had the old bfg mt and they were fine, no bulging. i plan on getting the km2 soon... 35s... 
