Models With Vertically Installed Engine

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Tread variance for models with a longitudinally installed engine, such as A4, A5, A6, A7, A8, Q5, Q7...

In this case, the variance between the front and rear axle may not be more than 2 mm

NOTE:

For all four wheels use only tires of the same construction type, size, and tread.

Excepted are vehicles that were shipped by Audi AG with different sized tires on the front and rear axle.

Always use tires with the deepest tread depth on the front axle.

Changing one individual tire is generally possible. Audi recommends at the very least however that the tires are exchanged on both sides of the axle.

With sport differential on the rear axle, Audi recommends always replacing the tires on both sides of the rear axle.

NOTE:

The technical background of the limitations are thermal pressure for the transmission oil due to a large difference in the rolling circumference of the tires.

Left tire on the front axle	Right tire on the front axle	Average	Variance
3.0 mm	3.0 mm	3.0 mm from left and right
Left tire on the rear axle	Right tire on the rear axle
3.0 mm	7.0 mm (new tires)	5.0 mm from left and right	2.0 mm from front to rear
			Within the permissible tolerance

Left tire on the front axle	Right tire on the front axle	Average	Variance
2.0 mm	2.0 mm	2.0 mm from left and right
Left tire on the rear axle	Right tire on the rear axle
4.0 mm	4.0 mm	4.0 mm from left and right	2.0 mm from front to rear
			Within the permissible tolerance