bobotech

I got a hub from a friend. It is a no-name hub, probably a joytech or something. I am looking to build up a spare set of disc brake wheels for my disc brake bike (700c). The rim is just a vintage 700c rim, Rigida. The hub is one of those disc brake hubs where the disc side flange spacing is like 61mm and the non-disc side flange spacing is like 45mm. The only real catch in the wheel build is that the holes from the disc side to the non-disc side are not offset like they are on standard hubs. I am going to attach a picture so you can see what I mean.

Will i still be able to build a standard 3x wheel with this hub? I already have the spokes and hub and rim, I just wonder if it will work or is the offset necessary for a proper wheelbuild?

hueyhoolihan

so the drive-side and non drive-side spoke holes are drilled straight across from one another. hmmm. shouldn't be much of a problem, i wouldn't think. spoke length calculators may be a bit inaccurate , but not much.

if the flanges were the same size i guess there could be long-term problems due to a torque mismatch or a rear wheel, but seeing as how the flanges are of a different diameter that may not be a problem.

OTOH, it could just be a manufacturing flaw.

FBinNY 

Yes, you can use the hub. If you lace up the first flange normally, the spoke lengths on the second will change up and down by about half the distance between holes - the distance between where the holes are and where they should be - or about 2-3mm or so. You need plan for that by adjusting the spoke lengths, or you might run into issues of alternation too long/too short.

You might get away without adjusting spoke lengths by splitting the difference and having the spokes on both flanges be long/short but only half the difference.

Retro Grouch 

Here's my question: "Are you BUYING a rim and spokes?" My general philosophy is that if I already own parts I'll try to put them together and see if I can make it work. If I'm buying parts I'll hold out for stuff that I KNOW will work.

It sounds to me like you were given a free hub so now you're trying to build it into a wheel that you don't really need. Believe it or not, I totally get that. If I already owned a rim and spokes I'd definitely lace it up. If I owned a rim but had to buy spokes, I'd probably still do it. If I had to buy both to lace up a wheel that might not work and that I really don't need, not so much.

Oh - and I'm pretty sure you'll be able to make it work, you'll just have to be a little more careful than usual to gradually tension the two sides evenly. I'd also round the spoke lengths up on both sides.

bobotech

Oh no, the hub was given to me super cheap, 5 dollar donation to them for it. I already have the rims and spokes from a wheel I disassembled a while back. I will put it together and see how it goes. I used a more standard rear freehub for the rear wheel which I already built and came out fine (with offset drilled holes and equal length flanges). The rear wheel was built up from half a package of new spokes. This front wheel in question will be built up from the disassembled spokes which appear to be fine. I'm not so worried about the front spokes being used. I have never broken a front spoke, only rear spokes. The rims were from a pair of wheels built up on Shimano Sante that i disassembled because the hubs were complete and in mint shape, they are being sold with the rest of the groupset.

fietsbob

My 02, you may be better off Just getting another Hub, of course . why start out handicapped ?

Cyclist01012

is it a disc hub?

FBinNY 

If you have spokes, a rim and some time to kill, then lace this up. Ignore the offset for the moment, and observe the results. The learning experience will give you some insights and a better feel for the interaction of hole position and spoke length. The lesson is easily worth the time involved.