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  1. #1
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    spoke pattern for 40h hi-lo rear hub

    I'm having a set of indestructable post-apocolypse wheels (40h maxi-car hubs, 26" velocity aeroheat rims, 14/15 wheelsmith spokes) built. I originally had the parts sent unbuilt from yellow-jersey, who kindly calculated spoke lengths for me (the equation at the back of jobst's book has like 10 variables!). When I went to build the wheels though I realized I was in a bit over my head and decided to have them built at the lbs. They got the front wheel together, but the rear hub has high-low flanges, and they say that you cannt use a cross-four patter on a small flange. I believe this is becaus ethe spokes overlap. What spoking pattern should be used in this situation? Maxi-car would not have made the hubs if they were unbuildable.

    (p.s. I also am awaiting a reply from andy muzi at yellow-jersey, so a definitive answer is forthcoming, but I still want to hear what you all think)

  2. #2
    Senior Member mrrabbit's Avatar
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    Should work just fine with 4X - like most 40 and 44 hole wheels. 3X cross should work as well...either side.

    =8-)

  3. #3
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by icaruswasright View Post
    I believe this is becaus ethe spokes overlap. What spoking pattern should be used in this situation? Maxi-car would not have made the hubs if they were unbuildable.
    4X on small flanges can cause a spoke to cross over the adjacent spoke's head. This makes it difficult to replace a spoke, but it's by no means "unbuildable". I'd still go 3X on both sides- you won't notice the difference.
    Jeff Wills

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  4. #4
    In beaurocratic limbo urbanknight's Avatar
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    Quote Originally Posted by Jeff Wills View Post
    4X on small flanges can cause a spoke to cross over the adjacent spoke's head.
    True, but I highly doubt that would be the case with 40h hubs.

    OP: Did you buy the spokes in the length for 4x? If so, build with that.
    "Well, I guess you can cut the arts as much as you want... Sooner or later, these kids aren't going to have anything to read or write about." (Richard Dreyfus as Glenn Holland)

  5. #5
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by urbanknight View Post
    True, but I highly doubt that would be the case with 40h hubs.
    Yes, but... 4X 40h on 26" rim?

    BTW: if you frequent Open Road Bicycles on Sierra Madre, tell Steve that "Big Jeff" says Hi...
    Jeff Wills

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  6. #6
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    The 4 cross pattern on a low flange hub can cause one spoke to cross the head of the adjacent spoke which can cause stress risers that can lead to spoke breakage.

    Buildable...yes.

    Good... no.

    A 3 cross wheel will be plenty strong if it is properly built.

  7. #7
    cycles per second Gonzo Bob's Avatar
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    My 36-hole 26" MTB rear wheel was built (at the factory) 4x using low flange Deore hubs. There's just a little bit of spoke head overlap but it's been no problem to remove and replace broken spokes (just a couple in 22+ years). There may no spoke head overlap at all with 40 4x spokes and low flange.

  8. #8
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Quote Originally Posted by Gonzo Bob View Post
    My 36-hole 26" MTB rear wheel was built (at the factory) 4x using low flange Deore hubs. There's just a little bit of spoke head overlap but it's been no problem to remove and replace broken spokes (just a couple in 22+ years). There may no spoke head overlap at all with 40 4x spokes and low flange.
    The only factory mtb wheels I have seen with 4x patterns are mid eighties Kuwaharas but they use a high flange Sansin hub.

    I have two customers who have been riding their bikes for 20 years and have yet to break a spoke or have any need to get their wheels trued.

    Both are at a point where they have almost worn out the stock Araya RM20 wheels so at some point I will be rebuilding these for them.

    My Kuwahara has a 36 spoke 4 cross on a Formula track hub (rear) and there are no crossover issues.

    Not every low flange hub will have issues but if there is spoke overlap, then a 3 cross wheel should be built.

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