19
The tables or the following formula can be used to compare the
to a derailleur gear
system:
Rohloff SPEEDHUB 500/14
Ratio of the derailleur gear system = C
S
Ratio of the
= IGR
C
S
The sprocket ratio on the
(e.g. 42:16) converts the slow rotational speed at the crank into
a fast rotational speed at the sprocket and reduces the input torque for the
in the same
proportion. To prevent overstraining the hub, a minimum sprocket ratio of 2.10 must be used. With the available
sprockets these minumum ratios are achieved by:
. This resembles a derailleur
transmission of 20:34. Larger chainrings can be used without exceptions.
¸
¸
Rohloff SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
x
Smallest permissible sprocket ratios
If mounted on a tandem or if the rider weighs over 100kg, the following sprocket ratios must not be undercut:
34:13, 38:15, 40:16, 42:17. This equates to a transmission factor of 2.50.
36:17, 34:16, 32:15 and 28:13
Sprocket ratios
The
has a
range of gears, that means gear #14 is 5.26 times greater than gear #1.
The 14 gears are evenly spaced out over this range in 13.6% increases. Through the choice of chainring and sprocket
in use, the
When the particular wheel/sprocket/chainring size and gear is not listed in the tables, then the following formula can
be used to calculate the exact
:
Formula key:
W = Wheel circumference
C = Chainring size
S = Sprocket size
IGR = Inner gear ratio listed in the following table
Rohloff SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
526%
can be tuned for the specific riding purpose. The
comes standard with a 16 tooth sprocket. 13, 15 and 17 tooth sprockets are available as alternatives.
In the following tables the distance travelled per crank revolution is listed for gears #1 and #14. The listed distance
travelled per crank revolution is shown in the tables for a variety of sprocket ratios and wheel sizes (20", 26" and 28"
wheels).
distance travelled per crank revolution of the
Rohloff SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
Distance travelled per crank revolution
= W
C
S
IGR
x
x
¸
Inner gear ratio IGR = hub revolutions per sprocket revolutions of the
Rohloff SPEEDHUB 500/14
gear #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
IGR
0.279 0.316 0.360 0.409 0.464 0.528 0.600 0.682 0.774 0.881 1.000 1.135 1.292 1.467
A T T E N T I O N
Technical Data
20
Technical Data
Table of distance travelled per crank revolution
wheels (wheel circumference 1.51m)
20"
Table of distance travelled per crank revolution
wheels (wheel circumference 2.06m)
26"
Table of distance travelled per crank revolution
wheels (wheel circumference 2.18m)
28"
Solo cyclists under 100k g
Sprocket
Chainring
from
to
from
to
from
to
from
to
28 tooth
0,91m - 4,77m
30 tooth
0,97m - 5,11m
32 tooth
1,04m - 5,45m
0,90m - 4,73m
34 tooth
1,11m - 5,79m
0,95m - 5,02m
0,90m - 4,71m
36 tooth
1,17m - 6,13m 1,01m
-
5,32m
0,95m - 4,98m
0,89m - 4,69m
38 tooth
1,23m - 6,47m 1,07m
-
5,61m
1,00m -
5,26m
0,94m - 4,95m
40 tooth
1,30m - 6,81m 1,12m
-
5,91m
1,05m -
5,54m
0,99m -
5,21m
42 tooth
1,36m - 7,16m 1,18m
-
6,20m
1,10m -
5,81m
1,04m -
5,47m
44 tooth
1,42m - 7,50m 1,23m
-
6,50m
1,16m -
6,09m
1,09m -
5,73m
46 tooth
1,49m - 7,84m 1,29m
-
6,79m
1,21m -
6,37m
1,14m -
5,99m
48 tooth
1,55m - 8,18m 1,35m
-
7,09m
1,26m -
6,64m
1,19m -
6,25m
50 tooth
1,62m - 8,52m 1,40m
-
7,38m
1,32m -
6,92m
1,24m -
6,51m
52 tooth
1,68m - 8,86m 1,46m
-
7,68m
1,37m -
7,20m
1,29m -
6,77m
13 tooth
15 tooth
16 tooth
17 tooth
Solo cyclists under 100k g
Sprocket
Chainring
from
to
from
to
from
to
from
to
28 tooth
1,31m - 6,89m
30 tooth
1,40m - 7,38m
32 tooth
1,49m - 7,87m
1,30m - 6,82m
34 tooth
1,59m - 8,36m
1,38m - 7,25m
1,29m - 6,80m
36 tooth
1,68m - 8,85m
1,46m - 7,67m
1,37m - 7,20m
1,29m - 6,77m
38 tooth
1,78m - 9,35m
1,54m - 8,10m
1,44m - 7,59m
1,36m - 7,15m
40 tooth
1,87m - 9,84m
1,62m - 8,53m
1,52m - 7,99m
1,43m - 7,52m
42 tooth
1,96m - 10,33m 1,70m - 8,95m
1,60m - 8,39m
1,50m - 7,90m
44 tooth
2,06m - 10,82m 1,78m - 9,38m
1,67m - 8,79m
1,57m - 8,28m
46 tooth
2,15m - 11,31m 1,86m - 9,81m
1,75m - 9,19m
1,64m - 8,65m
48 tooth
2,24m - 11,81m 1,94m - 10,23m
1,82m - 9,59m
1,72m - 9,03m
17 tooth
13 tooth
15 tooth
16 tooth
Solo cyclists under 100k g
Sprocket
Chainring
from
to
from
to
from
to
from
to
28 tooth
1,24m - 6,51m
30 tooth
1,33m - 6,97m
32 tooth
1,41m - 7,44m
1,23m - 6,45m
34 tooth
1,50m - 7,91m
1,30m - 6,85m
1,22m - 6,42m
36 tooth
1,59m - 8,37m
1,38m - 7,25m
1,29m - 6,80m
1,22m - 6,40m
38 tooth
1,68m - 8,83m
1,45m - 7,65m
1,36m - 7,18m
1,28m - 6,76m
40 tooth
1,77m - 9,30m
1,53m - 8,06m
1,44m - 7,55m
1,35m - 7,10m
42 tooth
1,86m - 9,76m
1,61m - 8,46m
1,51m - 7,93m
1,42m - 7,46m
44 tooth
1,94m - 10,23m 1,68m - 8,86m
1,58m - 8,31m
1,49m - 7,82m
46 tooth
2,03m - 10,69m 1,76m - 9,27m
1,65m - 8,69m
1,55m - 8,18m
48 tooth
2,12m - 11,16m 1,84m - 9,67m
1,72m - 9,06m
1,62m - 8,53m
13 tooth
15 tooth
16 tooth
17 tooth
Table of distance travelled per crank revolution for
wheels ->
Internet -> www.rohloff.de/service/downloads/documentation
650B and 29"
