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  1. #1
    Freak not tweak.
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    Wheel building question.

    Is it possible to lace a 40 hole hub to a 36 hole rim? And if so, is it a good idea at all? Thanks in advance.

  2. #2
    cab horn
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    Not a good idea.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    rules the earth BROCK SAMPSON's Avatar
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    Not at all.

  4. #4
    Senior Member Retro Grouch's Avatar
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    It's not just a matter of skipping a few holes in the hub. Since the hub holes and rim holes won't match up exactly, you'll need different spoke lengths as you go around the wheel.

  5. #5
    me have long head tube TallRider's Avatar
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    Well, Sheldon Brown does this sort of thing without problems. The spoke lengths won't be a big deal actually - you usually have 1-2mm of wiggle room in both directions on properly-chosen spoke lengths, and the differences from skipping a hole aren't going to be more than 0.5mm so that won't matter.

    The real issue, I think, is whether the hub ends up being weaker because of it. If it's a relatively low-flange with the holes spaced very close to each other, the forces on the flange may be problematic. But if it's a higher-flange hub, I'd say no problem.

    The other thing I'd say is that you can get good front hubs for cheap, so why bother. I got a Shimano LX front hub from Nashbar for $10 recently. Throw your 40-hole front hub on eBay - maybe it'll go for a high price since it's a rare/strange thing (but then again, maybe it's rareness and strangeness means you'll have few bidders) and just buy a 36-hole hub.

  6. #6
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    Quote Originally Posted by timcupery
    The other thing I'd say is that you can get good front hubs for cheap, so why bother. I got a Shimano LX front hub from Nashbar for $10 recently. Throw your 40-hole front hub on eBay - maybe it'll go for a high price since it's a rare/strange thing (but then again, maybe it's rareness and strangeness means you'll have few bidders) and just buy a 36-hole hub.
    Tim, I don't think the OP said which hub it was so I don't know if it's a front or rear.

    It really doesn't matter as far as the recommendation to proceed or not is concerned and Sheldon Brown can do things mere mortals shouldn't attempt.

    I further agree that properly drilled hubs are both readily available and relatively low in cost so there is no reason to take on this iffy project.

  7. #7
    Freak not tweak.
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    Well its actually a very special hub that I just got off of ebay. Its a 1934 Sturmey-Archer 2 Speed Fixed gear hub with drum brake. I think I am just going to try to find a 40 hole rim. My dream bicycle has gold velocity deep v rims on a black frame. But im not sure if you can get a 40 hole in gold without machined sidewalls. I am gonna ask around at the LBS soon.

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    Forty hole rims are typically used on Tandems and loaded tourers so getting a deep-V or similar rim in 40 hole drilling is unlikely. If you want it gold, get a plain Al rim and try to find an anodizing shop to do the coloring.

  9. #9
    ot.net slave
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    velocity makes their synergy rim in a 40 hole.

    There is nothing lithe or graceful currently on the market in a 40 hole drilling, if that's what you're getting at.

    - Joel

  10. #10
    Senior Member Retro Grouch's Avatar
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    Quote Originally Posted by HillRider
    Forty hole rims are typically used on Tandems and loaded tourers so getting a deep-V or similar rim in 40 hole drilling is unlikely. If you want it gold, get a plain Al rim and try to find an anodizing shop to do the coloring.
    I just bought a pair of 40 hole Velocity Fusion rims. I have no idea what colors are available. Mine are black with machined brake tracks. They've only got a 25mm section vs. 30mm for the Deep-V but then they also weigh about 40g less. If I had a special 40 hole hub that I wanted to build up, I'd definitely get a 40 hole rim.

  11. #11
    Freak not tweak.
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    Thanks guys. I guess the search will now begin.

  12. #12
    cyclist/gearhead/cycli... moxfyre's Avatar
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    Quote Originally Posted by timcupery
    Well, Sheldon Brown does this sort of thing without problems. The spoke lengths won't be a big deal actually - you usually have 1-2mm of wiggle room in both directions on properly-chosen spoke lengths, and the differences from skipping a hole aren't going to be more than 0.5mm so that won't matter.

    The real issue, I think, is whether the hub ends up being weaker because of it. If it's a relatively low-flange with the holes spaced very close to each other, the forces on the flange may be problematic. But if it's a higher-flange hub, I'd say no problem.
    I should be possible but a bit tricky and maybe weaker. Here's Damon Rinard's page on doing 36H hubs with 24H rims: http://www.sheldonbrown.com/rinard/36-24.htm

    Quote Originally Posted by timcupery
    The other thing I'd say is that you can get good front hubs for cheap, so why bother. I got a Shimano LX front hub from Nashbar for $10 recently. Throw your 40-hole front hub on eBay - maybe it'll go for a high price since it's a rare/strange thing (but then again, maybe it's rareness and strangeness means you'll have few bidders) and just buy a 36-hole hub.
    Nashbar often has good deals on hubs, but they're frustratingly spotty if you're looking for a specific model. They also seem to have very poor stock of 700C rims... nothing inexpensive but durable like the Sun CR18s *ever* seems to be available from Nashbar. Anyone else know a site that has good deals on rims?
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  13. #13
    Born Yesterday
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    maybe try aebike.com? They have QBPs catalogue listed on their website and I know for a fact that QBP carries the CR18s.

  14. #14
    me have long head tube TallRider's Avatar
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    Quote Originally Posted by moxfyre
    Nashbar often has good deals on hubs, but they're frustratingly spotty if you're looking for a specific model. They also seem to have very poor stock of 700C rims... nothing inexpensive but durable like the Sun CR18s *ever* seems to be available from Nashbar. Anyone else know a site that has good deals on rims?
    Lickbike.com always has the Sun CR18, in both 700c and 27" sizes, for $30. It's a great deal.
    I've gotten a lot of my rims on eBay, including some Sun M13II rims and a Ritchy 36-hole OCR rear rim that's slightly wider (like the CR18 as opposed to standard narrower road rims), and I expect the Ritchy will build up into a really durable rear wheel.

    Problem is, I need a 36-hole rear road hub, and Nashbar never has anything like it except for relatively expensive Ultegra hubs.

  15. #15
    Making a kilometer blurry waterrockets's Avatar
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    Quote Originally Posted by tomacropod
    velocity makes their synergy rim in a 40 hole.

    There is nothing lithe or graceful currently on the market in a 40 hole drilling, if that's what you're getting at.

    - Joel
    They make the Deep-V in 40-hole too. Velocity choices in 40h 700c are Deep-V, Dyad, and Fusion.

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