Audi A5 3.0 TDI Quattro tyre change
Discussion
The fronts are at 2.5mm the rears at 3mm at the moment, I know the quattro system is very sensitive to tyres so wanted to make sure, would I be better advised to replace all four with these depths?, I might hold off as got an old Shogun coming as a winter hack soon so will be parking the Audi up anyway.
Considering winter is nearly here I would replace all 4, at those tread depths performance in the wet is starting to be compromised.
I have an S4 quattro and replace all 4 at the same time, depending upon the time of year I might swap wheels around to even out the tyre wear, the S4 has more aggressive camber so wears the inside of the tyre more than the outside. Roundabouts will increase wear on the nearside tyres compared to the offside tyres.
I have an S4 quattro and replace all 4 at the same time, depending upon the time of year I might swap wheels around to even out the tyre wear, the S4 has more aggressive camber so wears the inside of the tyre more than the outside. Roundabouts will increase wear on the nearside tyres compared to the offside tyres.
I will replace all 4 I think but won't be doing it until the spring as getting a 4x4 for winter and some tip runs as doing a lot of DIY over the winter months.
Out of interest why is the Audi quattro system so sensitive to tyres, moreso than 4x4 systems on say a Land Rover or Toyota etc?.
Out of interest why is the Audi quattro system so sensitive to tyres, moreso than 4x4 systems on say a Land Rover or Toyota etc?.
Walter Sobchak said:
I will replace all 4 I think but won't be doing it until the spring as getting a 4x4 for winter and some tip runs as doing a lot of DIY over the winter months.
Out of interest why is the Audi quattro system so sensitive to tyres, moreso than 4x4 systems on say a Land Rover or Toyota etc?.
I don't believe the Haldex system has much issue just keep them equal on same axles, its more acute to keep them equal on full-time Torsion Quattro versions on opposing axlesOut of interest why is the Audi quattro system so sensitive to tyres, moreso than 4x4 systems on say a Land Rover or Toyota etc?.
Walter Sobchak said:
The A5 has the full time torsion 4x4 system, just wondered why it’s more sensitive to tyres than a lot of others really, I’m going to get all 4 done on mine.
I wouldn't say they're particularly sensitive to tyre wear - far less than Subarus etc of the 90s and early uR quattro which did more or less dictate minimal tread depth difference, due to their inability to deal with varying rolling radius.Audi advice generally on tyre tread depth etc for quattro is as follows:
Permissible differences in tread depth
t Tyres of the same construction and tread pattern should always be used on all four wheels.
t The tyres with the deeper tread should always be fitted on the front wheels. (NB I don't agree with this in all scenarios)
t It is basically possible to replace tyres individually. However, Audi recommends replacing at least both tyres on an axle at the same time.
t On vehicles with rear sport differential, Audi recommends that you always replace both rear tyres at the same time.
They also state some examples of acceptable and not acceptable tread depths, based on a few scenarios of one new or one old tyre, which basically boil down to:
If you take an average of front tread depths, rear tread depths and then compare those 2 averages front to rear, you don't want any more than a 2mm variation in any of those values (which may allow for far more than a 2mm variation in individual tread depths)
Given the wear you have now, if you were getting them done now I'd probably stick the least worn on the front and replace the rears immediately, then when they're worn rotate the recent rears onto the front and another new pair on the back. The ones moved back to front will now be bedded in and will wear better as a result. Given your current plan, I'd do as you suggest and change all 4
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