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Rolling diameter - legal wheel size Vic
https://www.cordiapower.com/forum/viewtopic.php?f=4&t=17955
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Author:  CordiaKaine [ 02 May 2016, 20:47 ]
Post subject:  Rolling diameter - legal wheel size Vic

Ok so just curious,
In legal terms of rim/tyre combo ;

the overall diameter of any replacement rim and tyre must not be:
1 more than 15mm greater than largest diameter tyre specified by the vehicle manufacturer for that model or vehicle series; or
2 more than 15mm less than the smallest diameter tyre specified by the vehicle manufacturer for that model or vehicle series

So what wheels have people used to pass rwc in Victoria?
I have bigger brakes so can't fit the original wheel with the
Tyre placard saying 185/75r13 and I highly doubt my 17"
Rim's would be able to fit a tyre no less than 15mm in diameter

Author:  Bitza [ 02 May 2016, 21:34 ]
Post subject:  Re: Rolling diameter - legal wheel size Vic

The cordia came out with 185/70/13 tyres on a 5 inch rim............I have 205/40/17 on a 7 inch rim.........over by 10mm......this makes my speedo out by 10 km/hr slower due to the larger radius. (60 is actually 50)

Not too mention the typical problem of the rim scrubbing the inside of the wheel well on full lock.

Author:  CordiaKaine [ 03 May 2016, 05:43 ]
Post subject:  Re: Rolling diameter - legal wheel size Vic

Bitza wrote:
The cordia came out with 185/70/13 tyres on a 5 inch rim............I have 205/40/17 on a 7 inch rim.........over by 10mm......this makes my speedo out by 10 km/hr slower due to the larger radius. (60 is actually 50)

Not too mention the typical problem of the rim scrubbing the inside of the wheel well on full lock.


Just double checked. You are correct, 185/70 it was lol I need to sleep more. I honestly thought the 17" rim would be a lot larger diameter. Cheers for that, looks like I have to get myself a smaller profile tyre ;)

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