Causes of rough running

6R 2009–2014 Causes of rough running ⇒ 10.1 Causes of rough running

Balancing wheels ⇒ 10.2 Balancing wheels

Conducting a road test before balancing wheels ⇒ 10.3 Conducting a road test before balancing wheels

Balancing wheels on stationary wheel balancer ⇒ 10.4 Balancing wheels on stationary wheel balancing machine

Vibration control system - VAS 6230 A- ⇒ 10.5 Vibration control system - VAS 6230 A-

Finish balancer ⇒ 10.6 Finish balancer

Radial and lateral run-out on wheels and tyres ⇒ 10.7 Radial and lateral runout of wheels and tyres

Checking radial and lateral run-out on wheels and tyres with tyre gauge - V.A.G 1435- ⇒ 10.8 Checking radial and lateral runout on wheels and tyres with tyre gauge - V.A.G 1435-

Checking radial and lateral run-out on wheel rim ⇒ 10.9 Checking radial and lateral run-out on wheel rim

Matching ⇒ 10.10 Matching

Flat spots caused by storage or handling ⇒ 10.11 Flat spots caused by storage or handling

Rough running can have a number of different causes. It can also be caused by tyre wear. Tyre wear caused by driving is not always evenly spread across the entire running surface of the tyre. This causes slight imbalances which affect the smooth running of a wheel which was previously exactly balanced.

Minor imbalances will not be felt at the steering wheel, but that does not mean that they are not there. They increase wear on the tyre and thus reduce the tyre service life.

Recommendation

To ensure

• optimal safety,
• smoothest possible running and
• even wear

throughout a tyre's service life, we recommend having the wheels and tyres balanced at least twice during the tyre's service life.