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Thread: Drilling Hubs

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    Drilling Hubs

    I would like to add 24 spokes to a 24 spoke Shimano hub.Can I do this without trashing the hub?Will there be enough room for the spoke heads?Are the flanges bigger on 48 spoke hubs?

    I would like to build Shimano hubs for my old touring bike but can't spread the frame to 145 for their touring hubs.They must have made some 130/135 spaced hubs at some point but I can't seem to find one.
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    Senior Member Retro Grouch's Avatar
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    I don't think that I've ever seeen a 40 or 48 spoke hub that didn't have pretty tall flanges. I suspect that if you tried to drill a common low flange hub the holes would be too close together and the hub would break out at the flanges.

    I think that I'd try removing 10mm of left side spacers from a 145OLD tandem hub and see how that works.

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    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by Booger1 View Post
    I would like to add 24 spokes to a 24 spoke Shimano hub.Can I do this without trashing the hub?Will there be enough room for the spoke heads?Are the flanges bigger on 48 spoke hubs?

    I would like to build Shimano hubs for my old touring bike but can't spread the frame to 145 for their touring hubs.They must have made some 130/135 spaced hubs at some point but I can't seem to find one.

    Nope, not going to happen. A typical 24-spoke Shimano hub is low-flange... adding a spoke hole between existing ones will just about remove the flange from the hub. Even 36-spoke hubs have minimal extra material in the flanges- I once had a cheesy (non-Shimano) hub flange explode due to radial spoke stress.

    If you look at a Shimano 48-spoke hub:
    http://harriscyclery.net/page.cfm?Pa...ils&sku=HU8103
    you'll see that the flanges are much larger than "normal". It should be possible to respace this hub to 135mm, also, since it uses a standard M10 x 1 threaded axle. Just remove the fat spacer, saw off 10mm of the axle, adjust, and go to town. You'll need a shorter skewer, probably, but that's easy.

    Just curious: why a 48-spoke wheel? I've had no problems doing loaded touring with 36-spoke wheels. I'm not small, either: 6-foot-4, 210 pounds. And since I ride a recumbent: http://home.comcast.net/~jeff_wills/jeff-big.jpg , a lot of the weight is on the rear wheel and there's no possibility of "unweighting" it on rough pavement.
    Jeff Wills

    All my bikes.

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