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12.5 tire on a 6.5 wide rim ?????

i believe it's doable, but rather skinny. i think you'd be better off w/ an 8" variety.
 
I ran 35 12.5's on 16.5 x 6.75 rims for many years and probably 60,000+ miles. No problem, it just makes the tire look kinda skinny for it's size.

Rene
 
I've heard of people (Orange Crush) doing it and was planning on going with that size on my dually.
 
I put my 35 12.5s on a 16.5x6.75 rim. they worked fine but I didnt like the skinny look or the way the center of the tread was bulged out. it looked to me like it would cause the center to wear out faster then the rest. like I said it worked fine for the time being but I didnt like the looks and ended up buying some wider rims.
 
My 35's wore evenly even on that skinny of a rim. There is enough sidewall to compensate...

Rene
 
33x12.50x16.5 on 16.5x6.75" stockers:

angleview.jpg
 
I run 37 x 12.50 x 17 on my stock 17x6 wheels (dually) and they work fine. give me a few and i'll post up a picture
 
Sorry it took so long, i was sun burned and hung over when i typed the reply this morning and so i kinda forgot:doah: to take the pics then. but here they are, a few from straight on and a few at an angle so you kinda get an idea of the sidewall shape, almost no bulge at all. these are 37/12.50/17 on a dodge dually with the stock 17 x 6.0 wheels. if you need pics from some other angle or even measurements just let me know. also, i had to shop around four or five discount tires as some refused to mount these like this and a few who would said there was no warranty (tread wear or road hazzard). finally got one who did it and gave me full warranties, but i had to bolt them up at home myself because of the rear spacers.

Dodge 008.jpg

Dodge 009.jpg

Dodge 010.jpg

Dodge 011.jpg
 
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