BMW ONBOARD COMPUTER Wartungshandbuch PDF herunterladen (Seite 87)

Make sure the ground is level

and firm and place the motor-

cycle on its stand.

Measure the tyre tread depth

in the main tread grooves with

wear marks.

Wear indicators are built

into the main profile

grooves on each tyre. The tyre

is worn out when the tyre tread

has worn down to the level of

the marks. The locations of the

marks are indicated on the edge

of the tyre, e.g. by the letters TI,

TWI or by an arrow.

If the tyre tread is worn to min-

imum:

Replace tyre or tyres, as applic-

able.

Wheels

Tyre recommendation

For each size of tyre BMW

Motorrad tests certain makes,

and approves those that it

certifies as roadworthy. If BMW

Motorrad has not approved the

wheels and tyres, it cannot

assess their suitability or provide

any guarantee of road safety.

Use only wheels and tyres ap-

proved by BMW Motorrad for

your type of motorcycle.

You can obtain detailed informa-

tion from your authorised BMW

Motorrad dealer or on the Inter-

net at www.bmw-motorrad.com.

Effect of wheel size on

ABS

The wheel size has a large in-

fluence on the functionality of

the ABS system. In particular,

the diameter and the width of a

vehicle's wheels are programmed

into the control unit and are fun-

damental to all calculations. Any

change in these influencing vari-

ables, caused for example by a

switch to non-standard installed

wheels, can have serious effects

on the performance of the con-

trol systems.

The sensor rings are essential

for correct road-speed calcula-

tion, and they too must match

the motorcycle's control sys-

tems and consequently cannot

be changed.

If you decide that you would like

to fit non-standard wheels to

your motorcycle, it is very im-

portant to consult a specialist

workshop beforehand, prefer-

ably an authorised BMW Motor-

rad dealer. In some cases, the

data programmed into the control

units can be changed to suit the

new wheel sizes.

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85

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Maintenance

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