[Audi A3/S3] Tyre wear (3.2)

[MikeeB]

I've just replaced the rear tyres on my 3.2 after 17k miles. The fronts are still going strong.

This seems quite odd to me, as I thought the fronts would go first.

Is this normal?

Cheers

-

Mike

[Dandle]

Yes its normal on haldex equiped quattro cars for the rears to wear faster. Never seen an explanation why though.

[hoofboy]

Ive done 13K now and can't believe how well the tyres look, bonus!

[MikeeB]

[ QUOTE ]

Yes its normal on haldex equiped quattro cars for the rears to wear faster. Never seen an explanation why though.

[/ QUOTE ]

Fair enough. Just that I thought that most of the drive went to the front wheels except when required.

When I had my urq, that used to scrub off the fronts first.

[harddrive]

Changed all four of mine at the same time as the wear was even all round. IIRC the car had done 22,000 miles.

[Xedos]

Save here, 24k all round replaced.

[gordie1973]

Just had first service = 18K, and have 6mm all round on first set of tyres.... Yes I know I must try harder....

[DukeDesmo]

My fronts wore on the inside edge so much that I had to replace them at less than 10k, Audi did me a '4-wheel alignment' and 14k later they're worn on the inside edge again, not as bad as before but still there. The dealer tells me it's normal, they called it 'Quattro scrub'.

I replaced the rears at around 21k as I had a puncture and it wasn' t worth repairing for what little tread was left.

[iceman2002_uk]

my tyres rear on the inside edge too, apparently its to do with the camber the wheels are set to

[Brisel]

If the front suspension is the same as for the R32, then do get it set up by an expert.

The standard setting leaves too much camber, so try 2 degrees of toe-in. My fronts wear evenly now

I'd say that camber is your problem on the rears too.

[cdco2]

The 3.2 runs as FWD most of the time and with the heavy lump up front the Fronts should be wearing first... fist set of mine went at 17K and that included a Front to rear swap to get them all bald at the same time. This set are going the same way.

[Dandle]

[ QUOTE ]

The 3.2 runs as FWD most of the time

[/ QUOTE ]

It doesnt, its front wheel biased but most of the time the car is moving there will be an element of power sent to the rear wheels(more the harder you accelerate).

[DukeDesmo]

[ QUOTE ]

[ QUOTE ]

The 3.2 runs as FWD most of the time

[/ QUOTE ]

It doesnt, its front wheel biased but most of the time the car is moving there will be an element of power sent to the rear wheels(more the harder you accelerate).

[/ QUOTE ]

I contacted Haldex about the front/rear drive split on my 3.2, this was their answer;

"The Haldex Coupling do not have a fixed split between front and rear. On

regular driving/steady state the coupling gives around 5-10 Nm to the rear.

On a 1/7 of a wheelturn we can transfer all available torque to the rear. In

a theoretical situation with the front wheels in the air we would transfer

100% torque tro the rear within 250ms.

However it is hard giving exact times and split since it is all depending on

driving situation, temperature etc etc since we do not use a straight curve

for the torque split, we just take what you need and transfer it to the rear"

HTH