25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
98% 82% 68% 55% 44% 34% 25% 18% 11%
5%
0%
5%
9% 12%
When the rider applies 20kg onto the pedal, he produces a crank torque of 34Nm. In gear #8 this results in
6Nm torque on the torque arm (18%
). With the same crank torque of 34Nm in gear #1 this
results in 33Nm torque on the torque arm (98% of crank torque). Gear #11 is the direct drive (1:1) the torque
on the torque arm is always zero.
of crank torque
Torque securing
With all gear hubs the axle tries to turn whilst riding. When riding in a reducing gear, the axle tries to turn backwards.
When riding in an increasing gear, the axle tries to turn forwards. The force with which the axle tries to turn is refered
to as torque. The amount of torque depends upon the force applied on the pedals and the gear selected. This torque
must be secured by some means to the frame.
On the simple three-speed hubs a flat sided axle is sufficient to secure the torque within the dropout. On a high
performance internal gear hub like the
the method of securing the torque must be
considerably more stable due to the wide range of gear ratios.
The amount of torque produced is shown in the following table:
Rohloff SPEEDHUB 500/14
Torque in percent of crank torque with a 42/16 sprocket ratio
Rohloff SPEEDHUB 500/14
Rohloff
CC OEM mounted in a frame with
adjustable
OEM dropouts
Backwards torque rotation
see picture below or next page, pictures 1, 2 and 3
Securing to the frame
Forward rotation
Backward rotation
Gear
%
Torque
26
3)
2)
1)
B
Exclusively for frame
F and G
types
(see "Frame types")
OEM axleplate
A (axle peg)
Exclusively
for frame types
A, B, C and D
(see "Frame types")
Standard axleplate
with long torque arm
The long torque arm is bolted behind the axleplate. The narrow end
is secured to the frame by means of a clamp or a
quick release block. The axle is prevented from turning t
. When removing the wheel, the
torque arm must first be released from the frame at the narrow end .
B
hrough these two points
B
A (axle peg)
Depending on the type of frame one of three options can be used to secure the torque.
1) Standard axleplate with long torque arm
2) OEM axleplate
3) OEM2 axleplate
All three anchoring options ensure the axleplate is secured to the frame in two positions to
. The first point
is the axle peg that is secured to the left side dropout. This i
The difference between the three options is point
. The hole pattern on the axleplates allow for individual
adjustment of the gear mechs in steps of 30°, so that nearly every frame type can receive an optimum cable routing.
prevents the axle from
rotating
s the same for all three options.
A
B
Securing to the frame
Mounting the SPEEDHUB 500/14 using an OEM2 axleplate is only permitted on frames with international standard
(IS1999) disc brake mounts. The OEM2 axleplate sits with its axle peg
in the dropout. The axleplate seat
secures
itself around the supporting peg of the
or
(when mounted on a bike with disc
brakes) or around the support bolt fastened through the lower brake caliper mounting hole (
A
B
Rohloff SPEEDBONE
Rohloff SPEEDBONE /
MonkeyBone
MonkeyBone
when mounted on a bike
with rim brakes). When removing the wheel, the axleplate falls away from the support bolt/
and out of the dropout once the axle is loosened..
The mounting of hubs with an OEM axle plate is only possible on frames fitted with
OEM dropouts. The
OEM axleplate sits in the dropout slot of the OEM dropout. The axle peg
slides in first followed by the support
block
into the same slot. The dropout itself prevents these two parts from turning. When removing the wheel, the
two parts fall out the dropout together once the axle has been loosened.
Rohloff
A
B
B (support block)
A (axle peg)
OEM2 axleplate
B (axleplate seat)
Exclusively for frame
types D and E
(see "Frame types")
