Alarming Tyre Wear

[ThundercatRob]

Originally Posted by Leapy

Why's that? The air strut itself doesn't control the geometry, just the springing medium and the damping.

I imagine it's because all the energy it's transferred straight to the tyres and none is taken up in the spring.

My Defender 90 Td5 original tyres lasted 70k, and still had tread on when I changed them. Bit of a difference...

[Leapy]

Originally Posted by ThundercatRob

I imagine it's because all the energy it's transferred straight to the tyres and none is taken up in the spring

Don't understand...a spring is a spring

[ThundercatRob]

Originally Posted by Leapy

Don't understand...a spring is a spring

Not if it's active or an air spring etc.

[Leapy]

Originally Posted by ThundercatRob

Not if it's active or an air spring etc.

A spring not a spring if it's "active" or "air"?. I think you're confusung the "spring" with the ride levelling function and the integral bur functionally seperate damper

[ThundercatRob]

Originally Posted by Leapy

A spring not a spring if it's "active" or "air"?. I think you're confusung the "spring" with the ride levelling function and the integral bur functionally seperate damper

Not all cars have springs, some have air bags, some also have a self levelling function, like Active cornering, which means the body of the car doesn't roll as much, so all that energy is transferred through the system straight to the tyres, so they wear quicker.

[Leapy]

Originally Posted by ThundercatRob

Not all cars have springs, some have air bags, some also have a self levelling function

Like I said, you're confusing springs, levelling and damping.

A 'spring' doesn't have to be made of steel coils: those are just one type of 'spring'...a spring can be an oil 'spring' - like in a hydraulic Citroen, a rubber 'spring' as in early non-BMW Mini's, or an air 'spring' such as in LR's, Jaguar's, MB's and trucks.

In all air sprung cars, the air provides the springing and directly replaces the steel coil springs of other cars. The air also - but separately - provides a hydraulic mechanism for the levelling function you talk of. This allows the level of a vehicle to be controlled - via an ECU - whether cornering, or under sharp braking or when heavily loaded. This keeps the contact patch of the tyre consistent with the road regardless of speed, braking or load. This managing of the tyre contact patch, through the air springing and levelling medium, is, in fact, an aid to reduced tyre wear not a mechanism that accelerates it.

If you're comparing, say, Disco 3/4 with a Defender for tyre wear, then factors like vehicle weight, vehicle performance potential, vehicle usage profile - whether it's the type of vehicle likely to be driven quicker or slower - tyre aspect ratio, tyre rubber mix, tyre design brief etc etc would be more significant than whether it was on air springs or not

[ThundercatRob]

Fair enough, I agree with alot of what you said, others bits I don't.

Your missing my point though about the energy transfer through the car, if a car rolls, some energy is going into making the car roll, if it's level, the energy goes straight through the suspension into the tyres.

Obviously it's nicer to drive through the corners, but that's not what we are talking about. It's about tyre wear.

[Leapy]

Originally Posted by ThundercatRob

Fair enough, I agree with alot of what you said, others bits I don't.

Your missing my point though about the energy transfer through the car, if a car rolls, some energy is going into making the car roll, if it's level, the energy goes straight through the suspension into the tyres.

Obviously it's nicer to drive through the corners, but that's not what we are talking about. It's about tyre wear.

It's about action and reaction and weight transfer and the effects on tyre geometry and thus tyre wear...but, OK, I officially give up

[ThundercatRob]

Originally Posted by Leapy

It's about action and reaction and weight transfer and the effects on tyre geometry and thus tyre wear...but, OK, I officially give up

I give up as well. Let's call it quits...

[wiLlfish]

Fank fuk for dat

Too growen nobburs argyewin bowl sprinngs Woz starting too gett tyresum an woz creaytin a bitt ov tenshun

[ThundercatRob]

Originally Posted by wiLlfish

Fank fuk for dat

Too growen nobburs argyewin bowl sprinngs Woz starting too gett tyresum an woz creaytin a bitt ov tenshun

Don't understand that, but thank you

[Leapy]

Originally Posted by wiLlfish

Fank fuk for dat

Too growen nobburs argyewin bowl sprinngs Woz starting too gett tyresum an woz creaytin a bitt ov tenshun

Had to drag you out somehow

[Bigmuz7]

Grown nobburs or not, I want to know why the fekkers (BMW) think its ok to bin decent tyres that have good tread on them all over, but outrageous wear on the 'inside' shoulders on a non steering axle and call it 'normal' ?

anyway whats the definition of normal ?

[willk]

Originally Posted by ThundercatRob

Don't understand that, but thank you

He means that he's Tyred of your discussion