Thread: Where would you put the new tyre

To give an idea of how sensitive the vehicle is and how fine the adjustments, "Basil" drove up to visit towing a trailer on Friday and could feel the vehicle adjusting for the minute movements of the trailer.

Originally Posted by Ean Austral

Ahh well just as I expected , back left, back right, front , and leave it as spare, or buy another tyre.


eani, meanie, miney , close my eyes and see where it goes.


Thanks all for the replies.


Cheers Ean

Ya gotta love forums , but you can bet one of em will be right . Lol

Hmmm, this is a potential flaw in my cunning plan for a second spare ...

The OD of my new D697 265/60 R18 is 775mm
The OD of my original 255/55 R19 is 763mm

I assumed that once the D697s had worn a bit, the 19" would work as a second spare if the first had already gone on the car somewhere remote. I thought this scenario similar to using the normal spare if it hadn't been in rotation.

So would it be drivable but a bit upset or would it spit the dummy and stop? Perhaps I should give it a go somewhere safe where it's easy to change the wheel back.

Also, I wonder how long can you leave it before rotating a normal spare into the mix? Really the handbook should cover this if it's an issue.

Cheers,
Scott

I will measure the 4 used ones for tread depth and see if 1 or 2 are close and see if it can go on the same axle as the one that's close.


You would have to rotate all 5 tyres every 5000ks for the spare to be used correctly then. Gotta love the modern cars.
If its that sensitive, then I would rather get the new tyre involved sooner rather than waiting till they are 50% worn and then have to put a new tyre in the mix.


Don't particularly want to buy a 6th tyre .


Cheers Ean

I had to unexpectedly and urgently throw on a brand new tyre when the other three were down to about 20%. I was worried about TR DSC etc etc and it was only goung to be a very short term solution. But the car doesn't even seem to notice it at all and it has now been on for about two months. Haven't tried it off road but it seems to handle suburbia and freeway just fine.

At 80% on the others I wouldn't worry at all. I would put it on the back as you might get more issues on the front with steering pulling etc.

The other variable not mentioned so far - is what type of tyre? 20% wear on a 15mm original tread depth (eg on MT) has a lot more difference than 20% wear on a HT tyre - starting at say 8mm.

In my experience at 80% you should be OK however it probably depends on the tyre. I was at about 60% when I put the new spare on the front left. I choose that position as it seems to wear the most.
I left it there while I rotated the other 4 through.
At the end the other 4 were at 5% and the new spare was at 15-20%. I didn't have any DSC issues and the car drove very nicely.

The tyres were the original Pirelli Scorpions.

Originally Posted by Ean Austral

I will measure the 4 used ones for tread depth and see if 1 or 2 are close and see if it can go on the same axle as the one that's close.


You would have to rotate all 5 tyres every 5000ks for the spare to be used correctly then. Gotta love the modern cars.
If its that sensitive, then I would rather get the new tyre involved sooner rather than waiting till they are 50% worn and then have to put a new tyre in the mix.


Don't particularly want to buy a 6th tyre .


Cheers Ean

We rotate every 5000ks with 5 and 6 tyres unless we are on a big trip(ie) more than 5000ks, then we rotate when we get back, I've put on tyres that were less worn the the ones already on the car, never had an issue, one just recently that had much more tread also, it was on the car for a few weeks without any problems, we had no choice, as we only had this tyre with more tread to replace the shagged tyre.

What I've noticed over the nearly 4yrs of owning the D4, is that the DSC reacts more to a deflated tyre, than one larger or smaller diameter tyre.

Baz.