Surely not.....

[Norretal]

I was contacted by someone with a 2014 Range Rover Evoque who'd taken their car to a garage with a puncture. It appears the damage is a nail or screw in the tyre wall, so a new tyre is required.

The garage informed them that they're required to replace all four tyres, surely not?? I've done a quick search and found nothing relevant and can't imagine why they've said this, other than thinking it's just sheer profiteering?

Any ideas gents?

[steamship]

Originally Posted by Norretal

I was contacted by someone with a 2014 Range Rover Evoque who'd taken their car to a garage with a puncture. It appears the damage is a nail or screw in the tyre wall, so a new tyre is required.

The garage informed them that they're required to replace all four tyres, surely not?? I've done a quick search and found nothing relevant and can't imagine why they've said this, other than thinking it's just sheer profiteering?

Any ideas gents?

I immediately profiteering as soon as I read that, but the following site would seem to point out the reason why:

https://www.lesschwab.com/blog/post/...ur-awd-vehicle

For the likes of our cars, the tolerance is apparently 4/32nds of an inch (3.2mm) difference between tyres. For Subarus, it is half that:

http://www.souzastireservice.com/tir...g-awd-4wd.aspx

Even having read through that, the 'actual' size of a tyre from a different manufacturer can be a different size (in circumference), despite being labelled as the same size.

[MikkiJayne]

You can get tyres 'scrubbed' in the US to avoid this exact situation - they will take tread off a brand new tyre until it matches the others on the car.

When this happens to me I buy a part-worn tyre of the same model and tread depth as the others. Usually plenty on ebay

[Turbo Tony]

My Cavalier manual says the same thing - you need to replace all four tyres together.

[Conquistador]

Yep, it does happen.

Volvos XC90s especially have a very small tolerance when it comes to different tyre tread depths. Anything over a couple of mm difference can eventually wreck the diff.

Originally Posted by MikkiJayne

...I buy a part-worn tyre of the same model and tread depth as the others. Usually plenty on ebay

I do the same. Plenty of perfectly good premium brand tyres on ebay, just don't buy the cheapest!

[Norretal]

Many thanks, I suspected their motive and you've confirmed it......let's see what their response is when I present a reasonable argument

[oldnick]

on any car in france there is a limit in tread depth permitted on an axle , MOT fail if exceeded ...5mm

[David's8]

I have a LR Freelander and there is considerable discussion of this issue. The manual states that

"Ideally tyres should be replaced in sets of four. If this is not possible, replace the tyres in pairs! Obviously each axle pair

There seems plenty of evidence that mismatching between front and back causes problems with the Haldex unit and diffs on Freelanders . Evoques had Haldex systems up to 2014 and then changed to GKN Driveline system. The systems need matched tyres within a certain tolerance tho' what that is I dont know.

[HPsauce]

Interesting, I can't find anything in my Volvo manual about that issue, and I'm pretty sure that's a Haldex 4WD system.

It does suggest swapping front/back at certain intervals to even out wear.

[kal_ay]

Originally Posted by Turbo Tony

My Cavalier manual says the same thing - you need to replace all four tyres together.

Is that a Cavalier 4x4 Turbo?