41
Wheel stability
When the
is built up into a 32/36 spoke wheel, it is considerably more robust than the
common 36 spoke wheels. The stability is approx. the same as a 48 spoke tandem wheel.
Rohloff SPEEDHUB 500/14
Rohloff
The spoke flanges of the
are built symmetrically. This allows the spokes to be at the same
angle on both sides of the finished wheel, this in turn leads to a much stronger wheel due to the evenly distributed
spoke tension.
To build up a strong wheel, the spokes must be tensioned to a
. On wheels with normal cassette
hubs, the tension of the spokes on the cassette side is considerably high (over 1200N) and this can lead to problems
with the nipples sitting correctly within their holes of the rim (see the MTB comparison underneath, the pretension in
the 8-speed cassette here is just 600N).
Due to the increased diameter of the hub flanges of the
, the spokes cross only two times
but at roughly the same angle as a three cross lacing pattern on smaller flanged hubs. There is less load on the spokes
because of the large spoke hole diameter. The spokes pull further away from the axle center, therefore the hub flange
has a better lever to pull the wheel around (torque = force lever length).
SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
x
The comparison shows the maximum spoke loads (the numbers in brackets are the pretensioned min. force of
the spokes after lacing/truing/tensioning):
minimum of 900N
The figures for the 8-speed tandem wheel are better than those of the solo MTB wheel due to the fact that the spokes are
not at so steep of an angle and there are
of them
. But even here, the
48
regardless that there are two riders on the tandem
wheel with 1206N against 1409N is the better option.
Rohloff SPEEDHUB 500/14
MTB:
Wheel with
, 32 spokes
Wheel with 8-/9-speed derailleur gears, 36 spokes
Rider 80kg, riding whilst standing
Transmission
: gear #4 (48/16)
Distance travelled per crank revolution: 2.52m
Transmission derailleur gears: 36/30
Rohloff SPEEDHUB 500/14
SPEEDHUB 500/14
Distance travelled per crank revolution: 2.47m
Tandem:
Wheel with
, 32 spokes
Wheel with 8-/9-speed derailleur gears, 48 spokes
Two riders 80kg each, riding whilst standing
Transmission
: gear #4 (48/16)
: 2.52m
Transmission derailleur gears: 36/30
: 2.47m
Rohloff SPEEDHUB 500/14
SPEEDHUB 500/14
Distance travelled per crank revolution
Distance travelled per crank revolution
The wheel
Rohloff SPEEDHUB 500/14
32 spokes
135mm frame spacing
Flange distance 30mm/30mm
8-/9-speed rear hub
36 spokes
135mm frame spacing
Flange distance 37.3mm/20.2mm
Rohloff SPEEDHUB 500/14
32 spokes
135mm frame spacing
Flange distance 30mm/30mm
8-/9-speed rear hub
48 spokes
145mm frame spacing
Flange distance 31.3mm/24mm
42
Laufrad
größe /
Wheel
size
Anzahl
Kreuzungen /
Number of
Spoke
Crosses
ERD
32-Loch
Speichen-
länge / 32-
HoleSpoke
lengths
18"
1-X
341-343
128
344
130
20"
1-X
374-376
144
377
146
24"
1-X
472-474
192
475-478
194
479-482
196
483-486
198
487-490
200
491-495
202
496-499
204
500-503
206
26"
2-X
516-517
226
518-521
228
522-525
230
526-529
232
530-533
234
534-537
236
538-541
238
542-545
240
546-549
242
28"
2-X
586
260
587-590
262
591-594
264
595-598
266
599-602
268
603-606
270
607-610
272
29"
2-X
611-614
274
615-618
276
619-622
278
623-626
280
627-629
282
Laufrad
größe /
Wheel
size
Anzahl
Kreuzungen /
Number of
Spoke
Crosses
ERD
36-Loch
Speichen-
länge / 36-
Hole Spoke
lengths
18"
1-X
341
126
342-344
128
20"
1-X
374-375
142
376-377
144
24"
1-X
472
190
473-476
192
477-480
194
481-484
196
485-488
198
489-493
200
494-497
202
498-501
204
503-506
206
26"
2-X
516
222
517-520
224
521-525
226
526-529
228
530-533
230
534-537
232
538-541
234
542-545
236
546-549
238
28"
2-X
586
256
587-590
258
591-594
260
595-598
262
599-602
264
603-606
266
607-610
268
29"
2-X
611-614
270
615-618
272
619-622
274
623-626
276
627-629
278
Spoke lengths 32/36 spoke hole rims
The
uses a spoke hole circle diameter of 100mm with 2.7mm diameter spoke holes
(2.5mm up until Serial No.44321). When lacing the
into a
, the spoke sizes
required will usually prove fairly difficult to find in the average bike shop. For this reason silver ‘Sapim Race’ spokes
2.0/1.8/2.0mm with Polyax 12mm nipples are available from
in lengths of 228mm to 244mm. The most
commonly used spoke length (for 26" wheels) of 238mm is also available in black. Below is a table showing the
required spoke lengths for 32/36 spoke rims. Due to the symmetrical hub flanges of the
, the
spokes are the same length on both sides of the wheel:
Rohloff SPEEDHUB 500/14
Rohloff SPEEDHUB 500/14
Rohloff
SPEEDHUB 500/14
26” wheel
On wheel sizes 26" and 28" the wheel must always be laced in a two cross pattern. Therefore, the table above shows
the spoke lengths for a two cross lacing pattern. On wheel sizes 24" and under, the spokes must only be laced in a one
cross lacing pattern. For this reason, the table above shows the spoke lengths for a one cross lacing pattern.
A spoke length calculator can also be found on our homepage to help work out other correct lengths of spokes that
may be required (www.rohloff.de/en/technical/speedhub/spoke_lengths/index.html).
A constantly updated list of spoke lengths can be found on the internet under
www.rohloff.de.
The wheel
