Bicycle Mechanics - 36 hole hub, 48 hole rim
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10-04-07, 10:51 AM
I'm planning to build a new wheelset for my Raleigh 20, and I got a killer deal on some rims yesterday. Then I considered the fact that these 406 rims were destined for Nexus 7 or 8 rear hub (depending on whether I can find a cheap used one), and that those are 36 hole. I have a feeling that this is a non issue - that you simply skip every 4th hole, but am I right? I've yet to build a wheel, so I'm a little out of my depth.....
It'll change the spoke lengths you need some, but I'll let you do the math to figure out how much.
10-04-07, 11:10 AM
I reckon with the aid of the online doohickey's I can manage that, but the essence of this is.....no problem. Right?
Hmmm. Tough one to start on. You basically have 4 sets of spokes. Usually you have different lengths only for drive side versus non-drive side and the leading and trailing sets are the same length for the same side. Yours may actually be the same for drive versus non-drive (mine were the same for my last nexus build) but your leading and trailing sets will be asymetrical - I think. And now my brain hurts thinking about how to determine their different lengths and which set skips a hole and where... Uggghhh.
10-04-07, 11:57 AM
I'm planning to build a new wheelset for my Raleigh 20, and I got a killer deal on some rims yesterday. Then I considered the fact that these 406 rims were destined for Nexus 7 or 8 rear hub (depending on whether I can find a cheap used one), and that those are 36 hole. I have a feeling that this is a non issue - that you simply skip every 4th hole, but am I right? I've yet to build a wheel, so I'm a little out of my depth.....Not a good idea. Rim spoke holes are offset side to side according to the flange their spokes come from. If you do this, half of the spokes will be going to the wrong side of the rim.
Also, the gaps where there's no spoke in the rim will create 12 weak spots in the wheel.
Building your first wheel is enough of a challenge without stacking the deck against yourself this way. Don't do it!
See also: http://sheldonbrown.com/wheelbuild
Sheldon "Rims Aren't Expensive" Brown
Was just reading Peter White's site (http://www.peterwhitecycles.com/velocity.asp) and he had this ditty too:
The 27" size Dyad is only available with 48 spoke holes. It can only be built on hubs having 48 holes. I will not entertain any silly proposals to build wheels using these rims with 36 hole hubs, nor will I discuss the subject
Seems like he's not a fan either ;)
10-04-07, 02:41 PM
10-04-07, 02:54 PM
Surely I can get round the "wrong side" issue by missing first one, then two holes? I'm reticent to give up on this, since I can't find the rim in a 36 hole, but I do recognise that I'm almost certainly being an idiot. Help me think about how to do it, and I'll probably decide it's too complicated.
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