Largest standard tyres on DII in the world - eg on G4

**ozscott** · 1st February 2009, 07:55 PM

Not really Slunnie, because the largest on the placard is 235/70/16, but the legislation in Qld does not use that as the reference point, it just uses the largest by the manufacturer with that vehicle, so if LR equip the G4 (assuming that they do, which I think is well arguable) and IF they were for eg 235/75/16 we would be home and hosed in Qld with 265/70/16 for example.

Cheers

**sniegy** · 1st February 2009, 08:10 PM

I am pretty sure the placard has 4 sizes from memory..
235/70/16 (16" x 7")
255/65/16 (16" x 8")
255/55/18 (18" x 8")
& the last one i cant seem to remember, but i am sure there was another, which may be what Graeme said 225/70!? but cant recall.
Cheers

**Slunnie** · 1st February 2009, 08:15 PM

You guys have it tough up there! Its off the standard size for diameter.
http://www.transport.qld.gov.au/reso..._vehicles2.pdf
Pg11

Originally Posted by Queensland Transport

The rim diameter may be varied from the standard size
but the overall diameter of the tyre must not vary by

more than +15mm or -26mm.

**Graeme** · 1st February 2009, 09:30 PM

The 4th listed size is 215/75-16, but MTRs weren't made in that size, with 225/75-16 being the closest.

Tombie · 2nd February 2009, 01:06 AM

Originally Posted by ozscott

Not really Slunnie, because the largest on the placard is 235/70/16, but the legislation in Qld does not use that as the reference point, it just uses the largest by the manufacturer with that vehicle, so if LR equip the G4 (assuming that they do, which I think is well arguable) and IF they were for eg 235/75/16 we would be home and hosed in Qld with 265/70/16 for example.

Cheers

they use largest for that vehicle in country of sale - not worldwide

Sorry

**ozscott** · 2nd February 2009, 06:59 AM

The Regulation (Transport Operations (Road Use
Management—Vehicle Standards and Safety)
Regulation 1999) doesnt actually specify which country - it provides as follows:

"Alternative tyres, rims and wheels
(1) Tyres and rims fitted to a motor vehicle that is a car, car
derivative or off-road passenger vehicle need not comply with
section 7(1) or 8(1) if—
(a) the combination of tyre and rim—
(i) has a diameter that is—
(A) not more than 15mm more than the diameter
specified by the vehicle’s manufacturer; or
(

not more than 26mm less than the diameter
specified by the vehicle’s manufacturer; and
(ii) accords with the specifications contained in—
(A) if the vehicle was manufactured before 1
January 1974—1 of the following manuals—
• the Tyre and Rim Standards Manual of
the Tyre and Rim Association of
Australia
• the 1981 Tire and Rim Association Inc.
Year Book
• the British Standard, BS AU 50
• the Japan Automobile Tyre
Manufacturers Association
• the Japanese Industrial Standards
(JIS-D4202) and (JIS-D4218)
• the European Tyre and Rim Technical
Organisation Practices (E.T.R.T.O.)
• the Deutsche Industrie Norm (DIN)
7818
• the Deutsche Industrie Norm (DIN)
7817; or
(

if the vehicle was manufactured on or after 1
January 1974—Table 2 of ADR 23; and
(b) the maximum tyre width is—
(i) for a car or car derivative—not more than 1.3 times
the width of the vehicle manufacturer’s widest
optional tyre; or
(ii) for an off-road passenger vehicle fitted with front
and rear beam axles—not more than 1.5 times the
width of the vehicle manufacturer’s widest
optional tyre; and
(c) the minimum tyre width is 70% of the width of the
widest tyre fitted to the vehicle but not less than the
vehicle manufacturer’s narrowest optional tyre...."

"Specified" and "vehicle" are not defined, but presumably the definition would be "as specified by the manufacturer for that particular vehicle". But no further words could be read into it I reckon...and particularly for a vehicle sold all over the world. The whole point of the section is to exclude application of the ADRs in certain limited circumstances...so the hunt is on for a Disco II specified by LR as being able to use say 235/75/16 in the world...

Cheers

**ozscott** · 2nd February 2009, 07:01 AM

those faces above in my post should be a "b" but it sees them as a face...

**rick130** · 2nd February 2009, 07:05 AM

Originally Posted by Slunnie

I'm not sure, but it was probably whatever was fitted to the Bowler Wildcat which runs D2 axles.

FWIW most use the Michelin/BF Goodrich Rallye Raid tyre in 235/85/16
BFGoodrich Tires - Rallye Raid

**pohm66** · 2nd February 2009, 08:52 AM

Not sure where...maybe on the 4wd action forum someone mentioned that they successfully got around the Qld tyre issue by proving that their vehicle had larger tyres in the O/S model. However it might be worthwhile double checking with a Certifier.

I would also check with your insurer to see if they had any quirky rules about this that might void your policy.

**ozscott** · 2nd February 2009, 10:05 AM

Thats what I am looking at - overseas models most likely, but I dont think that the US ones for eg are standard with large diameter ...mostly lower profile on 18's. As for insurance that a whole other issue...my view is that under the Insurance Contract Act (C'Wlth) the insurer can only reduce its liability by the amount by which the breach of policy (ie having a modified vehicle for eg contrary to the policy wording) contributed to the loss...just make sure you tell your insurer in writing what tyres you have one the vehicle, so that they might find it hard to say that at and underwriting level they wouldnt have insured it in the first place had they known.

Cheers

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