View Full Version : 33x12.5 on a 7" rim

12-18-2006, 12:24 AM
I was about to buy some wider rims for my new tires but I looked at some american sights and they all said that a 12.5 tire can go on a 7" rim. But kal-tire said when i got my old 11.5s that that was the biggest i could put on my stock rims. What would happen if i did go and do this. When i called kal tire on friday they said they would do it only if i signed a waver. So is it dangerous?

12-18-2006, 12:26 AM
probably would be ok, would just have to run a little lower air pressure to stop them from wearing weird

12-18-2006, 12:46 AM
What about offset? Im guess the tires would rub really bad up front but nothing out back.

12-18-2006, 01:06 AM
think about it, it will be 1/2 on each side

12-18-2006, 07:02 AM
i would just get the bigger rim so you dont oose so many beads

12-18-2006, 10:37 AM
i wouldnt go more than 4.5" wider than your wheel .but thats just me. you'll get a bit more of sidewall angle which could cause rubbing with improper backspacing as well as uneven wear. ive got 11.5 on an 8inch wheel, and my buddy as 12.5's on the same wheel. mine are a touch taller, but he's definitely got more pronounced sidewall bulge.

12-18-2006, 11:00 AM
Yeah, rims are cheap - keep the 7s for smaller skinnies for commuting or whatever. Get wide rims so you can go wider than 12.5 if you want later.

Mud Slinging Dumb Fawker
12-18-2006, 08:57 PM
Hey i ran 12.50 on 7in rims for a year and the big problem with it is the center of the tire is worn faster

12-18-2006, 09:17 PM
i ran my x-terrains 33x12.5 on 15x7 rim for10 months before i got wider rims and never got any bad wear:dontknow:

12-18-2006, 09:20 PM
A skinny rim will hold the bead better. It'll wear the center more though.

12-18-2006, 10:38 PM
OK thanks. If i run lower pressure that should help the wear problem a bit. And i thought it made more sense that it holds the bead better then a wider rim.

12-19-2006, 04:03 PM
Local Kal Tire also told me I couldnt run a chevy rim on a mazda??? What the hell, ran them for years just bought some used ones from OK Tire instead.

I must say 8" wide whitspokes painted black sitting on a white 93 mazda with the front dropped about 1.5 inches looked pretty cool. They stuck out of the fenders by about 3".

Run what you can, if you cant afford the wheels yet run what ya got. Save up and get some nice wheels that you want, when you can afford them.

Oh, and go to a different shop, one that will listen to you.

12-19-2006, 05:23 PM
buisnesses have to tell you this shit to cover their asses... if anything were to happen it would all come back to them..