OEM Rim Size (can't find anywhere)

[Jbf333]

I have a 1997 Mercury Mountaineer and am about to lift it and put bigger tires on. The rims are the tear drop design kind. Does anyone know what the largest tire you can fit on these are?

 

[rhauf]

if you're talking about the rim diameter, look at the size of the old tire. they should say the size on them, it'll read something like

205/75R15 the 205/75 is the tire size, the R15 means 15 inch rim. R17 would be 17" etc.

 

[Jbf333]

what about the rim width?

 

[Iron Weasel]

The base wheel was 15x7.
16" wheels were optional and I think they were 16x7 as well.

Check the door tag, it should tell you what rims it came from the factory with.

 

[BigBlackMerk]

if you're talking about the rim diameter, look at the size of the old tire. they should say the size on them, it'll read something like

205/75R15 the 205/75 is the tire size, the R15 means 15 inch rim. R17 would be 17" etc.

actually the R stands for radial not rim... the # after the R is the rim size

 

[Iron Weasel]

actually the R stands for radial not rim... the # after the R is the rim size

Yeah, common misconception about R meaning rim diameter.

If you have a LT235/75R15:

LT - Type of vehicle tire was designed for. LT = Light Truck metric. P = Passenger car. C = Commercial vehicle.
235 - Section width of the tire measured in millimeters (mm)
75 - Sidewall Aspect ratio measured in % of section width. 75 = 75% of 235mm.
R - Type of tire. R = Radial. D - Diagonal bias ply. B - Belted bias ply.
15 - Wheel diameter.

Now, the if the LT is after the size markings, like 31x10.50R15LT, then that would indicate that it's a numeric or "flotation" tire that's capable of carrying more weight than a LT metric tire.