Community > Rohloff Internal Hub Gears
Replacing Rohloff shifter cables on a Raven Twin tandem
HugoC:
Hello,
I'd like to ask the Rohloff experts we have on this forum a couple of questions:
1. The Rohloff instruction video for replacing the gear cables state that the cables need to be wrapped around the cable pulley before the Ex box is reattached to the hub. What are the possible consequences if the cable is cut short and is fixed to the pulley but NOT wrapped around the cable pulley before the Ex box is reattached? This may be the case with my Rohloff (long story.....) and the gear shifting works as expected. Could the only consequence be increased cable wear?
2. Has anyone had experience of replacing the Rohloff shifter cables on a Raven TWIN, which has cable spliiters? I cannot find any instruction on how to cut the correct length of cable for the 'front' cables. Does anyone have any advice or tips?
Thanks in advance
HugoC
mickeg:
I am not sure which hub you have, the EX box or the one with an internal gear cable.
I think Ravens do not use the EX box. But you said long story, so maybe yours is different.
I have the EX box, when I have installed cables, I cut them to the length described with the extra 200 mm inner cable. I would not suggest anything else.
HugoC:
Thanks for the prompt reply mickeg.
I can confirm that I have the EX box. These are fitted on the Mk 3 Raven Twins (tandems) by Thorn. I agree that the Rohloff guidance should be followed. However this may not always be the case and I'm interested in potential consequences of not following the advice.
Regards
HugoC
mickeg:
So, if I understand your question, you would like to use a shorter length of inner cable than you normally would to obtain the 200mm of inner cable when you do your cable cutting. And you would like to know what happens.
I have no clue what happens.
Good luck.
PH:
--- Quote from: HugoC on May 06, 2022, 07:20:31 pm ---Hello,
I'd like to ask the Rohloff experts we have on this forum a couple of questions:
1. The Rohloff instruction video for replacing the gear cables state that the cables need to be wrapped around the cable pulley before the Ex box is reattached to the hub. What are the possible consequences if the cable is cut short and is fixed to the pulley but NOT wrapped around the cable pulley before the Ex box is reattached? This may be the case with my Rohloff (long story.....) and the gear shifting works as expected. Could the only consequence be increased cable wear?
--- End quote ---
It isn't possible for the shifter to be functioning correctly without the cable fully wrapped around the pulley. It's a 2 minute job to take the outer plate off and have a look, you'll see that if you've missed a turn there won't be enough rotation to get all the gears!
It's not a good idea to have the cables too tight, or slack, there's nothing in the system that needs to be under tension. If you find the inner has been cut a bit short, there might be some excess in the outer, cutting X of that is the same as lengthening the inner by the corresponding amount.
I'll leave your second question, I have an idea of how they work but have never used them.
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