Pro/Cons of wider tyres (245 vs 265 on a stock D2)

**Shakey** · 9th May 2013, 11:38 AM

Originally Posted by gavinwibrow

But again, if I recall correctly, 50 mm rise actually means theoretically up to 100mm diameter higher tyres (car is only lifting by the radius, not the diameter). However, its the room under the arches and the turning circle bump stops that are the limiting factors meaning needing to keep under 31 diameter.

It is a total of 50mm rise, but the following is what the actual rules say 'The tyre diameter must not be more than 50mm larger or 26mm smaller than that of any tyre designated by the vehicle manufacturer for that vehicle.' and 255/65/16 is what is on the plate in my car so that immediately rules out 235/85/16 and then:

4.11 LOWERING OR RAISING VEHICLES
None of the codes in VSB 14 allow for the raising of any vehicle where the wheel track has also been reduced. These vehicles are subject to individual approval on a case-by-case basis.

Raising the height of the vehicle may be performed without certification providing the overall increase in vehicle height is not more than 50mm. This may be achieved as a single modification such as the installation of a 50mm lift kit, or by a combination of smaller lifts as described below:

the fitting of body blocks or lift kits (50mm maximum if no other modifications resulting
in a change of vehicle height are performed);
suspension modification, (50mm maximum if no other modifications resulting in a
change of vehicle height are performed);
changes to tyre size (maximum change in tyre size diameter of 50mm); or
a combination of the above that results in a change of vehicle height not exceeding
50mm.

**greg smith** · 9th May 2013, 01:08 PM

I have 245-75 AT federals put them on to try as dealer bested all other prices --so far I am really pleased but in the near future will be heading into the cape and rough country so will see just how good they are..Size wise they track well and seem to handle the wet conditions well

**Wortho** · 9th May 2013, 01:18 PM

A 2in lift will not change what size tyres you can run, if you can run it with a 2in you can run it standard. As the up travel does not change your tyres will still travel up into the guards just as far as before so it's more a matter of how big is your wheel arch, i.e a 33in tyre will not fit in a 32in.
A 235/85/16 will fit no worrys on a standard D2.
Also you don't get a wider footprint when you let you tyres down just a longer one.

**gusthedog** · 9th May 2013, 02:31 PM

For those considering a 235/85 I have them and think they are too big. I live in the hills and the loss of power is enough to give me the sh##s. I'll be going back to something like a 245/70 soon which at 14mm over standard should make the speedo accurate and I wont need my tru-speed speedo corrector anymore (people can PM me if they want it

).

For 99.95% of driving that I will ever do, standard 29's and some driving skill will see me through (hopefully - although my skills are lacking so probably not

). If I find it too gnarly, I'll go another way. After playing with tyre size and spending heaps of cash I have a car that is less driveable than standard on 32's. But it looks pretty

And yes I have a power chip, bigger intercooler etc but I still find the power loss too great - particularly for towing. I think my $ would have been better spent on difflocks.

Just my 25 cents worth (up 20 cents from 5 cents due to inflation)

**gavinwibrow** · 9th May 2013, 02:47 PM

Pricey, how much for the speed corrector? PM me if you prefer.

**Yorkie** · 9th May 2013, 02:54 PM

Originally Posted by gusthedog

For those considering a 235/85 I have them and think they are too big. I live in the hills and the loss of power is enough to give me the sh##s. I'll be going back to something like a 245/70 soon which at 14mm over standard should make the speedo accurate and I wont need my tru-speed speedo corrector anymore (people can PM me if they want it

).

For 99.95% of driving that I will ever do, standard 29's and some driving skill will see me through (hopefully - although my skills are lacking so probably not

). If I find it too gnarly, I'll go another way. After playing with tyre size and spending heaps of cash I have a car that is less driveable than standard on 32's. But it looks pretty

And yes I have a power chip, bigger intercooler etc but I still find the power loss too great - particularly for towing. I think my $ would have been better spent on difflocks.

Just my 25 cents worth (up 20 cents from 5 cents due to inflation)

funnily enough i tend to agree but the benefit is when you get offroad and do not get so many bangs and crashes under the car.
245/70 will do for most people, 245/75 for that bit extra. going slow on the highway hills with the camper is a pain but i put up with it for the benefits.

**gusthedog** · 9th May 2013, 03:13 PM

Originally Posted by Yorkie

funnily enough i tend to agree but the benefit is when you get offroad and do not get so many bangs and crashes under the car.
245/70 will do for most people, 245/75 for that bit extra. going slow on the highway hills with the camper is a pain but i put up with it for the benefits.

Funnily enough, I don't do too many of the tracks with potential for too much banging and crashing with the wife and baby son on board anymore

. Ahh times are a changing....

schuy1 · 9th May 2013, 03:38 PM

All I can say is if you have lots of banging and crashing under the car you are doing it wrong!
Cheers Scott

**Yorkie** · 9th May 2013, 03:51 PM

Originally Posted by schuy1

All I can say is if you have lots of banging and crashing under the car you are doing it wrong!
Cheers Scott

thank you for your comment oh wise one, now off you pop.

**gusthedog** · 9th May 2013, 03:56 PM

Originally Posted by Yorkie

thank you for your comment oh wise one, now off you pop.

Each to their own eh?

I would probably literally poo my pants doing that sort of track these days! I don't mind steep but loose rock and potential for death aren't on my fun things to play around with list.

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