|How to lace a 3-cross drive-side and radial Non drive side?||niteschaos|
Dec 31, 2002 8:37 AM
|With the amount of dish on 9speed shimano rear hubs, I was reading that radial lacing on the non drive side is helpful in keeping a wheel true because the higher tensions in a radial lacing pattern will put the non drive spokes at a level of tension closer to the drive side spokes.
Question: How do you lace that rear wheel? I checked sheldon brown and he didn't have anything posted. I've seen some wheels from Cannondale laced like that, but haven't been able for find a pic for it.
Dec 31, 2002 8:49 AM
|Radial spoking results in lower tension in keeping the rim centered.
If you want to raise the tension on the non-drive side spokes, use more crosses than the drive side or thinner gauge spokes than the drive side.
Good luck, winter is a great time to build wheels.
|Spoke heads in.||Spoke Wrench|
Dec 31, 2002 10:30 AM
|What this does is to decrease the average spoke angle a little so that it more closely matches the drive side. Consequently it requires a teence higher spoke tension on the left side in order to center the rim. I don't think that we're talking about a huge amount of difference here.
There is another trick that you can use to obtain more tension on your left side spokes. Tension the drive side spokes an extra 1/2 turn while the left side spokes are still a little loose. That lets you put more tension on the right side, before you round out the nipples, than you would be able to do with the rim centered. It's relatively easy to tighten the left side spokes to center the rim afterward.
Finally, is this something that you really need to do? Frankly, I doubt it. I really haven't had that much trouble hand building adequate tension into a normal 3 cross wheel. The ones that I've seen that were bad have all been factory built wheels. There sure seem to be a lot of guys riding around with normal 9 & 10 speed wheels who are not breaking spokes, so it looks to me like careful labor, rather than some unusual spoke pattern, is more likely to give you the result that you're looking for.
Spoke diameter has nothing to do with tension. Thinner spokes just deflect more so that, at equal tension, the reading on a tensiometer is higher.
|you meant spoke heads out, didn't you?||the other Tim|
Dec 31, 2002 2:27 PM
|Having the left side spokes inbound (heads out) decreases the angle on the left side, allowing a slightly higher tension in those spokes.|
|Oops, you're right.||Spoke Wrench|
Dec 31, 2002 2:38 PM
|Kind of gives you an idea of how much value I put in the concept, doesn't it?|| |