Mixing tyre types

[wbowner]

Hi,
Here is a bit of a dumb question.

Would it be possible to mix tyre types.

Eg
If I changed my standard 19" tyres on my new D4 which are wranglers I believe! with say Hankooks, would it be possible to hang on to one of the wranglers as a second spare which I would use only in an emergency.

I am hoping to swap the wranglers over before picking the car up for coopers or Hankooks. There is a good chance no one will want the originals so I may run with them for awhile and when I go to change them I am thinking of keeping one as my second spare casing only. If I can exchange I could keep a new one. I would only use this tyre in emergencies and until I could replace it, which could be a few days.

Is this a good idea or at least feasible.

Richard

[Scouse]

No problem as long as the tyres are the same size.
The electronics can be sensitive to different size tyres as it'll show up a wheel speed fault so it may be worthwhile to physically check they're the same diameter. Some brands have different diameters even though they're the same stamped size.

[~Rich~]

The rule was it had to be the same tread pattern directly across the vehicle.
If you have to temporally fitt a spare I'm sure that would be ok.
As mentioned same size tyres will be ok.

[PhilipA]

Seeing a lot of cars come with a space saver these days , I see no problem running a different size or whatever as a second get out of jail spare.

While I have 255.70x16 on the car I intend to have a 205x16 as a second spare (spare on my camper trailer).

If push comes to shove you can reduce pressure in the other tyres and maybe blow the spare much higher to make the rolling diameter similar then drive slowly somewhere.

Lets face it, it should only ever be used in an emergency which would imply away from civilization.
Regards Philip A

[wbowner]

Thanks all

I note the hankooks and wranglers have the same od so a good match



I guess if it came to it you would use a square tyre if it got you out of trouble 😊

Richard

[~Rich~]

Seeing a lot of cars come with a space saver these days , I see no problem running a different size or whatever as a second get out of jail spare.

Regards Philip A

Space saver tyres are narrower than the standard tyre but the same rolling diameter of the standard tyre.

A constant 4WD vehicle, especially a D3, D4 or RRS will not like a smaller diameter tyre if driven anything more than a short distance. ( Within a few mm is ok but not say 12 - 20mm or more)
Wheel sensors will pick up the difference and bring up a DSC warning or fault.

[PhilipA]

Space saver tyres are narrower than the standard tyre but the same rolling
diameter of the standard tyre.


No way Jose', not the ones I have had. Mazda 121, Honda Jazz have both been considerably smaller, and all the ones I have seen mounted on cars have been smaller.

Regards Philip A

[~Rich~]

I those cars manuals do they say to put the space saver on the undriven wheels? ( Rear for those you mention)

[PhilipA]

I those cars manuals do they say to put the space saver on the undriven wheels? ( Rear for those you mention) 13th February 2014 05:53 PM

That is my experience also, but keep in mind you are only using a second spare to keep a wheel off the road. The instances where both a damaged tyre and the first spare are unable to be repaired with plugs are few and far between.

I would be willing to pull the ABS fuse so that the traction control would not object on my D2. BTW the early Range Rovers warn not to use tyres with a greater difference than 10% in diameter, and my D2 at least has a very similar mechanical drivetrain. In my instance a 205x16 is less than 5% different to a 255.70x16 and will be much less if the tyre were inflated to say 45PSI and the others reduced to say 20PSI.
IMHO car manuals only say those things to protect the car maker from litigation from people with absolutely no common sense.
Regards Philip A

[gghaggis]

No way Jose', not the ones I have had. Mazda 121, Honda Jazz have both been considerably smaller, and all the ones I have seen mounted on cars have been smaller.

Regards Philip A

All space saver wheels fitted to modern permanent 4WD Land Rovers (and I'd imagine all other permanent 4WD's) are the same rolling diameter as the standard wheels.

Cheers,

Gordon

[101RRS]

Much to my surprise space savers on Subaru Impressa AWD are smaller in diameter than the main wheels.

[PhilipA]

I would like to know why the posters seem to be obsessing about space savers? I know I first brought it up but it is pretty obvious that with an electronic 4WD the space saver should be the same size whereas with many other cars they are not and has been pointed out even an AWD.

It is of course desirable that a space saver should be the same size but remember they are designed for on highway for the lowest common denominator. Maybe Land Rover decided that it was better to take up more space than to face litigation in the USA where some lawyer could "prove" a space saver was to blame.

If you were stuck in the desert with only a second spare say a camper trailer tyre would you care?

Wouldn't you give it a go and maybe pull the ABS fuse if the car complained?

Why has the thread gone off on a space saver tangent when the post is about different size full sized tyres?
I am doing what I posted and I now sign off
Regards Philip A

[101RRS]

Why has the thread gone off on a space saver tangent when the post is about different size full sized tyres?
I am doing what I posted and I now sign off
Regards Philip A

Because the use of smaller spacesavers in some vehicles is an extreme example of the use of different diameter wheels and types and highlights that the question of using marginally different size and types of tyres may not be as much an issue as some people think.

On my RRS I drove from Melbourne to Canberra with three 255/60 R18s and one 255/55 R18 (on the back) and had no issues with the systems - only a small difference but nevertheless a difference.

Garry

[gghaggis]

If you were stuck in the desert with only a second spare say a camper trailer tyre would you care?

Wouldn't you give it a go and maybe pull the ABS fuse if the car complained?


Because the above may be a fair point for a D2, where the centre diff lock is manually activated. But for a D3/D4, the lock will be triggered by the vehicle, moreso if the tyres are of differing rolling diameter. And of course, you can't pull the fuse for the ABS/TC.

So for any wheel (spacesaver or otherwise), it should be approx the same rolling diameter. That's why :angel:

Of course, in an emergency, one will be tempted to try anything.

Cheers,

Gordon

[dukemasterpro]

Hi,
Here is a bit of a dumb question.



Eg
If I changed my standard 19" tyres on my new D4 which are wranglers I believe! with say Hankooks, would it be possible to hang on to one of the wranglers as a second spare which I would use only in an emergency.

I am hoping to swap the wranglers over before picking the car up for coopers or Hankooks. There is a good chance no one will want the originals so I may run with them for awhile and when I go to change them I am thinking of keeping one as my second spare casing only. If I can exchange I could keep a new one. I would only use this tyre in emergencies and until I could replace it, which could be a few days.

Is this a good idea or at least feasible.

Richard

Good question and one that's been on my mind as I have 2 brand new spares for a trip but the 4 tyres on the vehicle now have done 25,000km. Trip will be another 13-14000km. Will either new spare be a mismatch?! ( identical size and make - Cooper at3 )