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Different Rim Width On Gtr ? Advice Please!

Sinista32

By Sinista32,
in General Maintenance

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Sinista32 Grand Master

Sinista32

Posted
Posted

Ok guys,

Would like the guru's to come out and tell me the impact of running a different rim width on a GTR.

Specifically I have a set of Panasports in the following trim and haven't had any issues. I bought my GTR with these rims in late 2003 and they were on my car until 2011.

Front - 17 x 9.5 +15

Rear - 17 x 10 +20

Tyres are 255/40/R17

I've heard not to run different rim widths on the GTR due to the attessa system ?

Why then does this work without issues ? Same tyre size I'm thinking.

Look forward to your comments.

Richard

Sinista32 Grand Master

Sinista32

Posted
  • Author
Posted

What do you mean works without issues?

I know for a fact my front drive gauge jumps all over the place with a different wheel on. Especially a spare tyre (fitted to the rear).

Not experienced this Owgasam. Gauge works fine, car drives the same and no Attessa light on (yes it works).

Wasn't until yesterday after measuring the rims I picked up the rim width difference. Fronts measured 25cm and rears 26cm. Close enough to 9.5 and 10.

I'll measure again today.

Rolling diameter is the same. 255/40/R17

And like you Terry Ive heard the same and my other sets are the same.

Owgasm Grand Master

Owgasm

Posted
Posted

Tyres are the same. But once you put them on a different size wheel.

Your rolling diameter will be out due to the stretching or bulging of tyre on different size rims.

There is a % of acceptance in difference, someone who remembers will come in soon. But most people just run the same all round.

Sinista32 Grand Master

Sinista32

Posted
  • Author
Posted

Same all round is obviously the easiest/best. Thanks Simon

I hope we hear % acceptable difference. I'm attempting to sell these rims in the FS section.

Better also do another more precise measure with a straight line today.

jiffo Mentor

jiffo

Posted
Posted

Don't fart about with manufacturer's rolling diameter tyre info, get the tape out and measure the circumference of every tyre.

Match them up side for side and put your largest circumference pair on the rear.

ATTESA can allow for some tyre wear.

As it's a 32 your transfer clutch pack isn't preloaded like later models.

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