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Old 09-19-06, 10:53 PM   #1
bensauce
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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.
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Old 09-19-06, 11:13 PM   #2
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Not a good idea.
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Old 09-20-06, 03:44 AM   #3
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Not at all.
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Old 09-20-06, 04:02 AM   #4
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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.
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Old 09-20-06, 05:30 AM   #5
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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.
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Old 09-20-06, 05:43 AM   #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.
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Old 09-20-06, 07:28 AM   #7
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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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Old 09-20-06, 07:45 AM   #8
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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.
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Old 09-20-06, 09:22 AM   #9
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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
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Old 09-20-06, 05:06 PM   #10
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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.
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Old 09-20-06, 05:32 PM   #11
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Thanks guys. I guess the search will now begin.
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Old 09-20-06, 05:57 PM   #12
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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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Old 09-20-06, 11:51 PM   #13
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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.
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Old 09-21-06, 06:54 AM   #14
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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.
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Old 09-21-06, 06:56 AM   #15
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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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