4Runner Rim Sizes

There's a great article on "fitting bigger rubber" in Aust 4WD Monthly (No 62). It gives you all the numbers to crunch re the bigger tyres. And stay with the 15" rims.

As far as J6 and j7 etc (width), the important thing is to make sure if you're going up a rim size (eg. 6" to 7") to fit a bigger tyre, the new rim has an adequate offset for the vehicle and the new tyre doesn't damage anything on full lock and/or full compression.

But to answer one of your questions - a "205/70/R15" means a "tread width of 205mm/a side wall height of 70% of the tread width/on a 15 inch rim"! Now that doesn't mention the required rim width though!

Fuel consumption - your theory is right but in practice you may burn more just getting up to speed.... I'm working on that at the moment - will let you know how I go with the current tank after fittin some 32"

And have a chat to your local tyre dealer about rim sizes (doesn't cost a cent to chat) and what will fit and can fit yours.

If you think your speedo is out, borrow someone's GPS and go for a run on the freeway to see what the error is. And remember it!

Good luck!

Sorry to go on

But why I'm saying I'm running 32", I'm actually on a 265/75/R16.

So the width is 265mm = 10.5"

So the side wall is 75% of the tread width - 199mm = 8.1"

So the side wall x 2 = 16.2"

Plus the rim size of 16"

Equals 32" There you go - easy as pi!

And in mentioning "offset" above, is to make sure the "wheel track" (ie the centre line of your current wheels in total don't go out further than the max allowed (25mm in WA) apparently!

G'day Shaun17

I had the chrome rims on my 4runner which were 16xJ6 and had 205/75-16 tyres.
These tyres are only 28.1 inches in diameter.
Try these web sites, one is to calculate tyre size and the other is BF Goodrich AT,s web site.
http:www.miata.net/garage/tirecalc.html
http:www.bfgoodrichtires.com/assets/pdf/all_terrain_ta_kd.pdf

The last trip I did to the gulf I used 235/85-16 and I was towing my CT but it was geared too high for low range 1st gear crawling.
Hope this helps.

Safe travells
Jim-Bob

G'day mate,
I got the RV6 4runner myself and it's got the alloys that come with the sr5 models. 15x7inch. Currently running a set of 32x11.5R15 MTR's as this is the biggest I could go without needing new rims. The 33's require you to get 15x8inch rims. Didn't want new rims and plus the speedo is accurate now right on the line. Fuel consumption is the same I'd assume, depends more how you drive though. Plus I just put a new reconditioned engine in my 4runner so I'm getting about 430kms before I need to fill up and the light comes on.

So all in all it depends on what you need and the size requirement will be determined by the type of driving etc...

cheers,