BMW Motorrad R 1200 GS Rider's Manual page 57

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Do not exceed the gross weight
limit of 937 lbs (425 kg)
Do not exceed the wheel load
limits of 375 lbs (170 kg) at the
front and 617 lbs (280 kg) at the
rear.
Adjust shock absorbers front
and rear, rear-wheel spring and
tire pressures to suit total
weight ( 50-, 53).
b
The total weight is the sum of:
– motorcycle with full tank
– rider
– passenger
– luggage