On custom 'cycle wheel hubs
05-13-18, 02:56 PM
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On custom 'cycle wheel hubs
Is it at all common to ask a machine shop to create a custom bicycle hub? What I desire I cannot find--a fixie hub with a disc brake. What I'm thinking of getting is two hubs designed so that a sprocket can be bolted to one side and the brake disc to the other. This will be the rear wheels of a quad, so the wheels must be able to be oriented with the brake disc on the left and the sprocket on the right, or the reverse.
05-13-18, 03:01 PM
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You will also have to have the cog threads on the left side wheel threaded the reverse of the right side so the cogs don't tend to unthread under pedaling pressure and, of course, threaded for a lock ring on both sides, which will also have to be mirror image threading from each other.
05-13-18, 03:09 PM
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Is it at all common to ask a machine shop to create a custom bicycle hub? What I desire I cannot find--a fixie hub with a disc brake. What I'm thinking of getting is two hubs designed so that a sprocket can be bolted to one side and the brake disc to the other. This will be the rear wheels of a quad, so the wheels must be able to be oriented with the brake disc on the left and the sprocket on the right, or the reverse.
Old tandem rear hubs often had threads on both sides, so they could run a drag brake on the left and a freewheel on the right. So you could use a threaded disc adapter on the left, and all the machining you would need is to cut a lock ring thread on the freewheel side.
You'd have to be careful about braking while backing up because that will unscrew the disc adapter. If there are enough threads, a lock ring on that side wouldn't hurt (but there probably won't be.
A reversible setup will be a lot more complicated. You'd need LH threads on both sides, and you will have to get custom LH thread cogs made too. You might want to reconsider your proposed solution.
05-13-18, 03:15 PM
#4
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white industries in california, may be able to build a hub for your needs, a small enough shop to be flexible.
With the CNC production to combine the product features their splined cog interface and a 6 bolt disc mount in this case...
really odd thing is, As I imagine it, Unless rear end is a fork , supported on both ends (like a bike wheel?
both drive and brake have to be on the same side, Right?
HUBS ? White Industries
earliest cars had final drive to the wheels , by chains... drum brakes.
or just a shoe pressing against the tire..
....
With the CNC production to combine the product features their splined cog interface and a 6 bolt disc mount in this case...
really odd thing is, As I imagine it, Unless rear end is a fork , supported on both ends (like a bike wheel?
both drive and brake have to be on the same side, Right?
HUBS ? White Industries
earliest cars had final drive to the wheels , by chains... drum brakes.
or just a shoe pressing against the tire..
....
Last edited by fietsbob; 05-14-18 at 08:38 AM.
05-13-18, 05:19 PM
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It all depends on how much $$$ you wanna spend, a hub like that is not impossible to make. However, I think having a flip flop hub, then having the machine shop create a lock ring with the standard 6 bolt pattern drilled into the modified lock ring is much cheaper. You'll have a lot of good results if you take the time to get careful measurements. Go out and get a cheap 6" caliper and a steel rule.
05-13-18, 05:34 PM
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Here's how I would do it. I'd go get two Disc freehubs then do one of things in this https://www.bikeforums.net/bicycle-m...xperience.html to them.... ie weld up the freehubs then add a single sprocket adapter.
Last edited by Trevtassie; 05-14-18 at 02:19 AM. Reason: spellin
05-13-18, 10:10 PM
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Is it at all common to ask a machine shop to create a custom bicycle hub? What I desire I cannot find--a fixie hub with a disc brake. What I'm thinking of getting is two hubs designed so that a sprocket can be bolted to one side and the brake disc to the other. This will be the rear wheels of a quad, so the wheels must be able to be oriented with the brake disc on the left and the sprocket on the right, or the reverse.
Utah Trikes offers a "freewheel" differential (not a true diff): Utah Trikes - UTCustom Freewheel Posi Differential
Samagaga makes a true differential. I believe it comes on some Hase trikes: SAMAGAGA
OTOH, if you have your heart set on some peculiar design, Surly offers their "Ultra New" hub with a fixed gear (with lockring) and disc mount:
https://www.universalcycles.com/shop...16&category=80
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05-21-18, 12:28 AM
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If you're building a quad, why not use one of the commercially-produced two-rear-wheel conversions with a differential in the middle?
Utah Trikes offers a "freewheel" differential (not a true diff): Utah Trikes - UTCustom Freewheel Posi Differential
Samagaga makes a true differential. I believe it comes on some Hase trikes: SAMAGAGA
OTOH, if you have your heart set on some peculiar design, Surly offers their "Ultra New" hub with a fixed gear (with lockring) and disc mount:
https://www.universalcycles.com/shopping/product_details.php?id=53016&category=80
Utah Trikes offers a "freewheel" differential (not a true diff): Utah Trikes - UTCustom Freewheel Posi Differential
Samagaga makes a true differential. I believe it comes on some Hase trikes: SAMAGAGA
OTOH, if you have your heart set on some peculiar design, Surly offers their "Ultra New" hub with a fixed gear (with lockring) and disc mount:
https://www.universalcycles.com/shopping/product_details.php?id=53016&category=80
No seriously, I just ordered two.
05-21-18, 07:25 AM
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With a fixed gear, your legs can already function as a rear wheel brake. Why do you need a disc? Put the disc brake on the fork; the front brake does most of the work anyway. Once your rear wheel starts to skid, it doesn't matter how much more potential braking power you can apply; you've already reached the limit of what will help you stop.
05-21-18, 12:10 PM
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With a fixed gear, your legs can already function as a rear wheel brake. Why do you need a disc? Put the disc brake on the fork; the front brake does most of the work anyway. Once your rear wheel starts to skid, it doesn't matter how much more potential braking power you can apply; you've already reached the limit of what will help you stop.
05-21-18, 12:33 PM
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05-21-18, 10:51 PM
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Utah Trikes - UTCustom Catrike Fat Cat-4 Quad
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