Thread: big tyres, td5

Yorkie

Unless you are doing regular harder trips I wouldnt go for 265/75s. I run two sets of tyres so I can have the both of both worlds.

But if your relying on a single set, the 245/75 size will be a good compromise.

Angus

Originally Posted by McDisco

Yorkie

Unless you are doing regular harder trips I wouldnt go for 265/75s. I run two sets of tyres so I can have the both of both worlds.

But if your relying on a single set, the 245/75 size will be a good compromise.

Angus

Agreed, I am running Maxxis Bighorn's and did not want to compromise the tarmac driving so have 245/75 and the car in general handles much better than the 265's, it's just finding what is right for your own needs. Aside from the increased noise I am happy that I went 245 and not 265.

cheers
JB

Originally Posted by harlie

Sorry to be a party pooper – is there any consideration of Legalities? I’m not trying to be the kill joy here but I would think it only fair for people who are encouraging the fitment of illegal tyres to at least inform the enquiring owner of this fact. If you then choose to go ahead than sweet...

http://www.transport.qld.gov.au/resources/file/ebde8d0521b67c6/Pdf_modification_motor_vehicles2.pdf

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.

The 50mm rule quoted here many times is a national recommendation that is NOT adopted in law by any Australian state – so does not apply as the states have legislated tighter regulations.

Since the D2 is standard with 235/70R16 or 255/65R16 or 255/55R18 under these laws the largest tyre is around the 245/70R16 unless you have the vehicle blue-plated which will include the speedo mod to satisfy the instrumentation rules as well

Interesting Harlie,

Looks like similar situation in Victoria.

http://www.vicroads.vic.gov.au/NR/rd...340/0/VSI8.pdf

I didn't know that...

Mark

Originally Posted by Hendrik

Hi Harlie
What does blue modding involve? The speedo can be corrected with a TruSpeed Unit, but what else needs to be done? Is it an expensive exercise?
Cheers
Hendrik

Hi Hendrik

If a QLD reg (similar process for other states) vehicle is modified outside the STD regulations it must be inspected and approved. This process will be different depending on the type of modification and may involve testing and/or engineer inspections/test.

If the mod is approved they will fix a Vehicle Modification Plate (it’s Blue in colour hence the term) next to the compliance plate and record the details on their mainframe system.

I've not looked at getting tyres approved so I'm not sure how many hoops would need to be negotiated.
As another example – fitted a long range tank to the D2 and all that was required was a certificate from the tank manufacturer and filling out a form at QT – they then fitted the blue plate with the Modification code. As we said at the time, if the car catches fire and the tank is not approved we're on our own…

Ask your insurance co if they would like a reason not to pay after a big accident … Ask the coroner if he would like to make recommendations after a fatality – this is why a lot of tyre retailers will not fit the sizes that we are talking about - the larger the diameter of the tyre the less affective the brakes are - and your kidding if you think the accident investigation team is silly enough not to notice....

Only reason I think of this issue is because one of my Brother-In-Laws works for one of Aus largest insurance companies in a team that’s sole purpose is to find evidence that will allow the company to deny the claim. And let me assure you that I am absolutely gob-smacked with what they do – best one is Jet skis that are damaged during road transport. "Can we inspect the securing device that was fitted on the rear of the jet ski when it came off the trailer?" "What – you didn’t have one – I’m sorry too bad". And yes he mentions tyres, too big, too small & too wide...

this would have to be one of the best tyre calc's ive found yet.

Tire Size Calculator - tire & wheel plus sizing

oh, and yorkie, the tyres on my D2..255 55 18's only measure 29 and a bit inches! they look huge
so 265 70 18's for me...

cheers phil

My D2a Td5 Classic Country came standard with 255/65 x 16's (on 8" alloy rims) ... previous owner put on a set of Cooper ST 255/70's ... almost 4% oversize ... so far after several thousand k's I think they are a pretty good match for the vehicle ... no clearance issues, rides OK on the tarmac without excessive noise, off-road so far so good ... but last price check (local at Jax) was $355ea fitted and balanced ... jeeeezuz!!

3 x of them have heaps of life left ... front LH is feathered off on the outer edge ... seems a wheel alignment would have been a good idea

Still, they've done 55k since fitting, and probably have another 20-30k left in them (except the feathered one).

Just my 2 bobs worth. On my 01 D2 manual with 2" OME lift, I have been running 245/70/16 Pirelli Scorpion AT's. These are slightly taller than standard 235/70's and put my speedo out about 4 km/hr. I recently put on a set of 265/75/16 Cooper ST's the differences I encountered were as follows:

• Speedo out by +9%, 9km/hr at 100km/hr but use my GPS for accurate speed reading,
• Improved fuel economy about .5km per litre due to the motor reving lower
• Cant drive up the SE freeway in 5th due to gearing
• On road ability difference not noticeable
• Offroad ability brilliant
• Modification to spare wheel carrier to suit larger tyre required
• Slightly harder to get into the car due to being almost an inch higher.(only cos I am only 175cm tall)

My reccommendation would be, as already mentioned, the 245/75/16's as a single set but I think 2 sets is the way to go and I am in the market for a 2nd set of rims preferrably steel for offroading. My reason for this is that my Disco is my daily drive and average 450km per week predominantly city driving and the noise of the ST's gets a bit much. But hey they only cost me $600 on EvilBay for a set of 5.

Cheers

Originally Posted by Fluids

My D2a Td5 Classic Country came standard with 255/65 x 16's (on 8" alloy rims) ... previous owner put on a set of Cooper ST 255/70's ... almost 4% oversize ... so far after several thousand k's I think they are a pretty good match for the vehicle ... no clearance issues, rides OK on the tarmac without excessive noise, off-road so far so good ... but last price check (local at Jax) was $355ea fitted and balanced ... jeeeezuz!!

3 x of them have heaps of life left ... front LH is feathered off on the outer edge ... seems a wheel alignment would have been a good idea

Still, they've done 55k since fitting, and probably have another 20-30k left in them (except the feathered one).

what are they going to align?? all they can adjust it the toe in/out.

cheers phil