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  1. #1
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    Surly 1x1 and Rohloff Speedhub

    Hi Guys,

    I would like to change the frame of my Rohloff-MTB to a Surly 1x1 (http://surlybikes.com/frames/1x1_frame/). But I donīt really know how to handle the potential chainline probleme. I would like to use the SLX crankset (http://cycle.shimano-eu.com/publish/...mountain.html). Do you think that will work out fine? AFAIK the Surly frame BB is 73mm...

    Thanks

  2. #2
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    Surly 1x14

    brettsportler I run a Rohloff on a 1x1 frame it all fitted up quite easy Shimano SLX cranks are made to work with either 73 or 68mm frames. You actually have some extra adjustment via the spacer that sits on the bb cup for those that are using an e-type f/der.
    I love all things Rohloff.

  3. #3
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    Great, thatīs what I wanted to hear! :-)

    Cheers

  4. #4
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    Brettsportle,

    The hub chain line is 54 mm, and the link you gave for the crank says "Chain Line 46.8mm" which should be the middle ring. Yes it has a 2.5 mm spacer on the drive side but that will not be any help to you. Even if you removed the bash ring and used that position for your chainring you would only have a 51.8mm chain line.

    Edit: a 2.2mm offset is well within the recommended, I would try for better myself

    Most mtb cranks have a 55mm outer ring position, I would look for another crank.
    Last edited by dsurprise; 11-16-2009 at 10:24 AM.

  5. #5
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    The 2 ring SLX cranks spec the chainline for the mid point between the 22 and 32T rings which is why it is a narrow 46.8mm, it's the same crankset as the 3 ring cranks so as long as the OP uses the outside ring position instead of the bash he'd be OK..
    I'm a member of NSMBA and IMBA Canada

  6. #6
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    dear all,

    I think thats what Iīll do, remove the bashguard and switch the middle ring to outher position...

  7. #7
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    Rockyuphill, thanks for making it all clear 46.8 + 2.5 + 5 = 54.3 = perfect

    I re-read your advise several times and could not figure it out.

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