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Axle length

Discussion in 'Bicycle Mechanics and Repairs' started by bikepacker, 1 Nov 2007.

  1. bikepacker

    bikepacker Über Member

    A question that was asked of me last night and I didn't know the right answer was: Is it okay to put a 130mm hub in a frame designed for 135 and the opposite? This to be done without having the frame altered.
     
  2. TheDoctor

    TheDoctor Man-Machine Staff Member

    Location:
    Stevenage
    Simple answer is 'It depends'. If it's a steel frame this should be fine (in fact, some frames are 133mm so you can use either). Carbon or alloy you're risking cracking the frame. Don't know about Ti.
    I'd just add another locknut on either side of the axle to take it to more like 135mm.
     
  3. gbb

    gbb Legendary Member

    Location:
    Peterborough

    Doesnt that lead to another problem tho....alignment of your derailleur and cassette would be incorrect.

    Not saying i'm right, but surely theres going to be an issue there.
     
  4. TheDoctor

    TheDoctor Man-Machine Staff Member

    Location:
    Stevenage
    Well, yes. You'll need to tweak the indexing and/or the end stops of the rear mech.
    'Sno biggy.

    Why does your friend want to do this, out of interest?
     
  5. OP
    OP
    bikepacker

    bikepacker Über Member

    Thanks for the info.

    He has been offered a couple of wheels at a good price and wanted to know if he could fit them on his tourer (Dawes Galaxy). I believe they are 105 hubs.
     
  6. TheDoctor

    TheDoctor Man-Machine Staff Member

    Location:
    Stevenage
    Sounds good. I'd do the locknut thing rather than spring the stays in, but being steel it should be fine either way.
     
  7. Axle length relative to drop-out spacing is rather critical, installing a couple of extra lock nuts will certainly increase the OLND (over lock nut dimension) but will compromise safety by reducing the axle stubs. You need a few mm within the drop-out lest the back wheel drop out. With solid/nutted axles there is usually enough to play with but on QR axles just adding spacers is asking for trouble.

    Much more proffeshnal to cold-set the rear triangle to suit the new hub, its easy to do (depending on the strength of the frame) just remember to align the drop-outs and hanger properly afterwards.