How do flat tyre sensors work

[SauRoNZA]

I stopped doing that for precisely that reason. Eco mode might have saved me some petrol but tyres weren't lasting.

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Strange I've never experienced it.

On old tubed tyres it made sense as you had a "bubble" inside pushing it out, whereas on modern tubeless tyres even if pressured to the extreme it's very minimal to non-existent as it's balanced across the rim.

Not just a case of bad brand/set of tyres? Did you actually see it wear down the middle only or just wear very quickly as a whole?

If the latter it's just the compound of the tyre, not the pressure.

 

[bwana]

Strange I've never experienced it.

On old tubed tyres it made sense as you had a "bubble" inside pushing it out, whereas on modern tubeless tyres even if pressured to the extreme it's very minimal to non-existent as it's balanced across the rim.

Not just a case of bad brand/set of tyres? Did you actually see it wear down the middle only or just wear very quickly as a whole?

If the latter it's just the compound of the tyre, not the pressure.

They were wearing down the middle.

The tyre place said that was a ridiculous pressure to be using and suggested something more in the area of 220.

 

[Geoff.D]

On a 4x4 it really shouldn't matter as they should all wear down the same regardless if rotated or not. (Weight being left out of the equation of course which will affect it somewhat).

On a FWD or RWD though rotation is exactly what will allow for only replacing two at a time if done at regular intervals and you'll get further across the entire set.

Unless you have one of those fancy BMW's you hate so much, then the rears and fronts are different sizes and you have no choice in the matter regardless.

Very dependent on how often the 4WD is activated and the vehicle itself. I find on my one, the fronts wear faster than the rear wheels hence the rotation order. RWD normal.
And thanks for the tip about the BMWs --- another reason to avoid them

On my wife car the same. the fronts wear faster than the rears, noticeably so (RWD). Also have two standard rim spares and do exactly the same. ( the Biscuit has long been sold off as a useless piece of equipment to carry around)
One spare lives in the garage.

 

[Geoff.D]

Strange I've never experienced it.

On old tubed tyres it made sense as you had a "bubble" inside pushing it out, whereas on modern tubeless tyres even if pressured to the extreme it's very minimal to non-existent as it's balanced across the rim.

Not just a case of bad brand/set of tyres? Did you actually see it wear down the middle only or just wear very quickly as a whole?

If the latter it's just the compound of the tyre, not the pressure.

They were wearing down the middle.

The tyre place said that was a ridiculous pressure to be using and suggested something more in the area of 220.

Yes absolutely, Overpressure will wear the middle regardless of the make or compound. Under pressure will wear the edges. The right balance is something that varies from vehicle to vehicle and make to make. It is a matter of finding the right values, and those printed in the door labels ar just a rough guide. General road conditions, ambient temperatures and driving style all influence the choice.
So @bwana experience is spot on.

And what I know about tyres I learnt from my brother in law who was in the tyre business for 40 years.

 

[SauRoNZA]

Very dependent on how often the 4WD is activated and the vehicle itself. I find on my one, the fronts wear faster than the rear wheels hence the rotation order. RWD normal.
And thanks for the tip about the BMWs --- another reason to avoid them

On my wife car the same. the fronts wear faster than the rears, noticeably so (RWD). Also have two standard rim spares and do exactly the same. ( the Biscuit has long been sold off as a useless piece of equipment to carry around)
One spare lives in the garage.

Yeah your turning wheels do wear more quickly assuming you drive normally as all the weight sits there and shifts there under braking etc.

But all the more reason to rotate and spread the load otherwise you often get very weird vibes from the back.

If you don’t do rotation regularly enough it’s pointless though.

 

[SauRoNZA]

They were wearing down the middle.

The tyre place said that was a ridiculous pressure to be using and suggested something more in the area of 220.

Yeah like Geoff says it’s a balance of finding the sweet spot.

Those values are often also just applicable to the actual tyres that came with the car and don’t work quite the same for all other brands etc.

It’s why keeping an eye on things is paramount. Also actually put your head under the car and look at the tyre; don’t just feel it out otherwise you might get a random surprise.

Funnily enough on my last car even using the most extreme pressure by the manufacturer I still wore the edges down so actually went another 20 kpa beyond them.

 

[Geoff.D]

Follow the same rotation principle, LHS sides stays on the left.

Now, in this thread, there is the comment about Renault claiming in the manuals that rotation has no benefit at all?
One has to wonder about these things.

 

[SauRoNZA]

Follow the same rotation principle, LHS sides stays on the left.

Now, in this thread, there is the comment about Renault claiming in the manuals that rotation has no benefit at all?
One has to wonder about these things.

A comment is a comment until it’s proven with evidence.

 

[Rouxenator]

Check out this cool "re-learn" feature on the Escalade. He got new wheels with new sensors and this is how the car learns which sensor is where. (at 18m40s)