Audi Workshop Service and Repair Manuals > A4 Mk3 > Wheels and tyres | Wheels, tyres. axle align | Tyre requirements and tyre maintenance

Driving style

1. Constant driving speed, no deceleration or acceleration.

Example:

2. Braking

Most wear is caused during braking.

Example: Braking from a speed of 50 km/h.

Braking distance (m)	Lateral acceleration in g → Remark	Wheel slip	Wear
Vehicle allowed to roll to a stop		0	0
100	0.1 g	4	1
50	0.2 g	8	4
12.5	0.4 g → Remark	32	2000-3000

¹⁾	g = gravitational acceleration: 9.81 m/s²

²⁾	A deceleration of 0.4 g corresponds to heavy braking.

3. Acceleration (driving style)

Slip caused when driving off gently is approximately the same as that caused when driving at a constant speed of 100 km/h.

Example:

	Wheel slip	Wear
Driving off gently	1-2	1
Driving off normally	7-8	5
Driving off with wheels spinning	20 or more	100-200

Cornering (driving style)

A »sporty« driving style and driving at higher speeds also cause greater wear when driving through corners.

In practice, this means that wear is increased 16-fold when the cornering speed is doubled. This is the price that has to be paid for going faster.

Example: Driving through a corner with a radius of 150 m.

Speed (km/h)	Lateral acceleration in g → Remark	Wear
50	1 = 0.13 g	1
80	2.5 = 0.33 g	6.5
100	4 = 0.53 g	16

³⁾	g = gravitational acceleration: 9.81 m/s²

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