Hub/freewheel combo to give 50mm chainline- Mtbr.com
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  1. #1
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    Hub/freewheel combo to give 50mm chainline

    My On One Inbred is optimised for a 50mm chainline. At present I'm using a Hope XC hub plus Rennen spacers, but I'd like to get a proper dedicated SS hub and freewheel.

    Problem is that details on chainline seem to be few and far between and I really don't want to fork out a wad on a wheel build only to discover that I've screwed things up.

    So, can anyone suggest a decent disc compatible hub freewheel combo that will give me a 50mm chainline? (centre of sprocket 17.5mm from inner face of drive side dropout)

  2. #2
    achiever
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    Surly and a freewheel is 53.5. WI Eno hub is spaced to 47.5, I think. I just did a Scandal build with a Surly hub and had to use a 115 spindle bottom bracket and 3.5mm of spacers to get the chainline correct with my spiderless XT M750's and an ISAR/Homebrewed chainring.

    It's really pretty easy to shim your chainline out and 53.5 will work fine, the Scandal is pretty much an aluminum Inbred.

  3. #3
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    check out this page, looks like using White Industries hub will get you close.
    http://www.sheldonbrown.com/chainline.html

    I'm using a Surly with a White Industries freewheel, which gives me about a 55mm chainline. 46.5 + 8.73 = 55.23

    My moutain bike crank with the ring in the outer position is 55 mm, perfect!!!

  4. #4
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    Hmm, my problem is that I've got a BB I really like (SKF) and a crankset/chainring combo that I really like (middleburn Uno) and I'd prefer not to change either. Really don't want to move the BB off center either if I can help it, so spacing the drive side across is not really an option.

    Looks like it's white industries or one of the splined options...

  5. #5
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    I thought I had saw somewhere that White Industries SS crank, hub and freewheel all worked together with the same chainline. (makes sense)

    They do, the only trouble is it's 47.5mm

    You could add a spider to your crank and get a 48mm chainline?

  6. #6
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    I think the Paul word hub with a WI freewheel is 51mm.

  7. #7
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    I don't think I saw it specified... What is your current chainline? You would want a hub to match that. When On One says the Inbred is "optimized" for a 50mm chainline, they are saying that to keep good clearance between the chainstay and the rings your crank's chainline should be out to at least 50mm, and I'm pretty sure this has the largest relevance to people running a triple up front.

    Edit #2: I see i misread the first post and you do in fact have a 50mm chainline at your crank. Oops
    Last edited by boomn; 10-28-2009 at 01:27 AM.

  8. #8
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    I'm with dsuprise. I also have an Inbred, and running the chainring in the outer position (stylo cranks), a surly hub with a WI freewheel gets you within 1.5mm. Pretty darn close really. grab a ruler, look at how much 1.5mm is, then compare it to the length of your chainstays. 1.5 divided by 425mm give a deflection of 0.35%. Guaranteed that your chain will rattle around more than that over rocky ground...

    C

  9. #9
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    All well and good, except that my Middleburn Uno crankset has no spider (the chainring is the spider) so I can't shift the position of the front chainring to the outermost position.

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