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Lads. I have been searching the threads about tyre size on rims etc etc.  Yes there is heaps of info and it’s been great. Just brought some 18x 9.5x+12 work wheels. I went to Bob Jane and said I want some 255/35/18 on them and he said he wouldn’t fit them. WTF I thought. He reckons not legal ( this is Victoria the nanny state).

Im curious has anyone else put 255 on 18 recently and have you had any issues. Are they illegal. Not that I give a fxxk anyway.

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I can't speak to legal issues but 255 is the right width for a 9.5" wide wheel. The R33 GTRs shipped with 245 width tires on a 9 inch wide rim. You can safely run either 255 or 265. If they don't know something as basic as that I wouldn't want them to be anywhere near a set of work wheels.

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Yeh that’s what I reckon Josh. 35 profile I the same rolling diameter as the factory 225/50/16. Yeh fxxk him I’ll go somewhere else and get 255’s. After reading all threads I’m confident they won’t scrub on fronts at full lock. 

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Pretty sure there is no "legal" for tyre width vs rim width; however, manufacturers do have approved rim width for combinations of tyre width/sidewall height - and I would expect a tyre shop would not take on the potential liability of fitting a tyre that the manufacturer does not recommend.

For example Yoko AD08R in 255/35/18 are approved for 8.5-10" rim

https://www.gordonleven.com.au/_file/63cb0ad3-540b-7e9f-abd2-5e290241619f?inline=true

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