Multi-Speed Hubs (Internal Gear Hubs); Multi-Speed Hubs - How They Work And How To Use Them - BMW Mountain Bike Enduro Owner's Manual

6.4 multi-Speed Hubs (Internal Gear Hubs).

Two advantages of multi-speed hubs
the fact that you can switch through all gears by the same lever. Besides
this, the chain lasts a lot longer than with derailleur gears, provided it is
serviced regularly.
Multi-speed or internal gear hubs from Shimano are available with a
free-wheel, i.e. the free-wheel hub is combined with a hand activated
V- or roller brake, or with an integrated drum brake, also referred to as
back-pedal brake. The latter is operated by pedalling backward. The
best braking power is achieved with the pedals on a horizontal level.
Multi-speed or internal gear hubs from SRAm are available with a
free-wheel, i.e. the free-wheel hub is combined with a hand activated
V- or drum brake, or with an integrated drum brake, also referred to as
back-pedal brake. The latter is operated by pedalling backward. The
best braking power is achieved with the pedals on a horizontal level and
in low gears.
Rohloff speedhubs are available with a free-wheel, i.e. the free-wheel
hub is combined with a hand activated rim brake (mechanical or hydrau-
lic), or with a disc brake (mechanical or hydraulic).
a
(a)
are their enclosed design and
b
6.4.1 multi-Speed Hubs - How They Work and How to Use
Them.
Internal gear hubs are equipped with a twist grip or thumb shifter for
changing gears as well as with an indicator showing the current gear.
According to the hub manufacturer you can either continue pedalling
without load on the pedals or freewheel. Read the operating instructions
of the gear manufacturer. If you are in doubt or if you have any questions,
please contact your BMW partner! In any case, make sure changing
gears makes as little noise as possible.
SRAm twist grip shifters (b): To change gears, twist the grip, stop ped-
alling for a moment and do not move the pedals. SRAm I-motion also
allows gear shifting during pedalling and in stationary.
Twist grip shifters for Shimano nexus
Continue pedalling during shifting. However, to ensure a jerk-free and
low-noise gear shifting, be sure to reduce your pedalling power.
Practise switching gears in a place free of traffic until you are
familiar with the functioning of the shift levers or twist grips of
your bicycle.
c
(c) and Rohloff hubs (d):
d
33