BMW Mountain Bike Enduro Owner's Manual page 21

Bicycles that are delivered together with the present manual
(a)
are only designed for single person use and not for free-
hand cycling. Overstress may result in breakage or failure of
essential components, such as e.g. frame, handlebars or fork.
This can lead to an accident with unforeseeable consequences
resulting in death!
(b)
Trailers must be mounted to models with hydraulic brake
systems only! Only use suitable trailers that were mounted
professionally at a bicycle specialist shop of your trust. Full
suspension models are generally not approved for trailer
mounting.
a b
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