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  #1  
Unread 29th December 2010, 03:50 PM
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Default General Tyre / Tire Discussion

50 series tyres offroad- I thought I was the only one silly enough to do that!
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  #2  
Unread 3rd January 2011, 03:26 PM
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All else being equal, the longer they last, the less grip they have
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  #3  
Unread 5th January 2011, 01:47 PM
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Quote:
Originally Posted by Barry View Post
Are they grippy or not?--------------------------------[/B]'Stick like ***** to a bl@nket' - to quote a traditional Aus saying.[B]
I couldn't help it, I have to ask, does this mean they stick real good?
I know my dogs ***** sticks real good to shoes, I have not tried it on a blanket.
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Unread 17th March 2012, 06:31 PM
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Quote:
Originally Posted by Rally View Post
All else being equal, the longer they last, the less grip they have
The addition of silica to tyre compounds is a game changer. For a similar tyre type and use on my motorbike it added well over 50% to the life.

AFAIK the only AT tyre in suby sizes to have it is the Geolandar AT-S.
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  #5  
Unread 18th March 2012, 04:11 PM
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Indeed- which is why I said all else being equal

Quote:
Originally Posted by Sigmund View Post
The addition of silica to tyre compounds is a game changer. For a similar tyre type and use on my motorbike it added well over 50% to the life.

AFAIK the only AT tyre in suby sizes to have it is the Geolandar AT-S.
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  #6  
Unread 8th April 2012, 02:01 AM
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Quote:
Originally Posted by Rally View Post
Indeed- which is why I said all else being equal
Sure.

But silica in some compounds now means we are comparing oranges with apples.

To add to apples/apples data: with the Dueller AT 693 IIs on the Foz, they're now at about half the new tread depth after 38k km. That includes a fair amount of camper trailer towing, many k's around mountain blacktop and about 3k km of outback dirt roads (towing).
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Last edited by Sigmund; 8th April 2012 at 02:05 AM.
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  #7  
Unread 18th July 2012, 10:17 AM
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Default Tyre/tire size limits in OZ

Have seen thread after thread about size of tyres/tires.

Here in OZ not all the states over the years have been consistent, however we have overriding rules at a federal level that the insurance mob refer back too (I doubt any of us would want to take the debate up with them if it goes wrong in an accident and are looking for coverage )

The states have effectively given way over recent times to the common consistency based on the ADR Australian Design Rules, there is a document that defines the limits before needing certificates:

http://www.infrastructure.gov.au/roa..._2011%20v3.pdf

This puts our modern subies and such, into the softroader category, if we like it or not - now where is that middle finger when you need it ...

In short (take a read for yourselves) is that:
No more than 15mm diameter increase on wheels (see section 4.2.4)
Or you are running illegal ( or at best in dubious territory )

As mentioned before, of course you can choose to debate, but when push comes to shove I doubt any of us would be wanting to take up a debate over interpretation and definitions with insurance companies and teams of lawyers.
The rules are pretty clear (at least in m mind )


As for other countries, best you check carefully, make sure you are not exposing yourself to liabilities. I would very surprised if our mates in the USA, UK do not have equivalent rules.

Not wanting to preach, but do take care in your choices/advice if lawyers get involved there are normally some nasty witch hunts undertaken, and it would not be healthy to have this great forum put under the microscope.
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  #8  
Unread 18th July 2012, 09:09 PM
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great right up. thanks for that. its great that you have given us an actual figure of 15mm in diameter.

this is actually one issue i did not think of when buying a subaru is tyre size, another reason why other soft roaders such as the grand vitara are better due to already having a larger tyre size stock.

i would say from this research some on this forum would be running an illegal size
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  #9  
Unread 18th July 2012, 09:50 PM
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Im pretty tired (pun?) but I got from that 15mm is allowable without certification. Does that mean 15mm+ could be approved with an engineers certificate? I, ahemm, may or may not be one of those members.
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  #10  
Unread 19th July 2012, 12:25 AM
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Quote:
Originally Posted by thunder039 View Post
i would say from this research some on this forum would be running an illegal size
Sssshhhhhh

Quote:
Originally Posted by stilson View Post
Im pretty tired (pun?) but I got from that 15mm is allowable without certification. Does that mean 15mm+ could be approved with an engineers certificate?
It does but some engineers may not want to. Admittedly it was many moons ago but I've had 14" wheels/tyres engineered on my old RX3

Quote:
I, ahemm, may or may not be one of those members.
Again...ssshhhhh
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