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Tyre size. Front diameter inc.

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Old Jan 2, 2017 | 08:10 PM
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From: Oztralia
Default Tyre size. Front diameter inc.

My Oz 2012 IS 350 has 225/40/18 front, 255/40/18 rear.
I would like to put 235/40/18 on the front (PS3) as I have some available.
Does any one know if the slightly larger diameter +3% will make the ETC or any thing else throw a fit?

Cheers Baz
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Old Jan 5, 2017 | 09:26 PM
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My own reply.
Had some Michelin PS4's available 235/40/18.
Too large , Square on rim AND rubbed on rear inner guard on lock

Fitting 225/40/18 PS4's tomorrow. Plus 255/40/18 PS4's to the rear.
Those Michelins are a more fuller tyre than the Bridgestone Turanzas the car came with.
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Old Jan 7, 2017 | 11:45 AM
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Down under the cost in OZ this week is approx:
F 225/40/18 $260 Au
R 255/40/18 $360 Au
Running 38psi atm.

The 235/40/18 are a lot cheaper as its a common size here. Great for Audi and Golfs to replace the OE 225/40/18's. Thats why I had some.
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