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Single-Cross Wheel Build - Crossing Question

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Single-Cross Wheel Build - Crossing Question

Old 04-28-16, 08:53 AM
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kmcrawford111
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Single-Cross Wheel Build - Crossing Question

Hello everyone,

I'm building a new ebike wheel. Here are the specs:

hub: Q100 350W motor (128 mm flange diameter), 36-hole
rim: Weinmann ZAC 19 700c 622x19, Aluminum, double wall, non-eyeleted
spokes: DT Swiss Alpine III (triple-butted, 253mm for both sides)


Following the advice from Grin Cyclery, and instructions from Sheldon Brown, I've got all of the spokes in the hub and rim. Somehow I made an error with how the spokes surround the valve hole, but after shifting over all of the spokes by 2 positions, that's OK now. I believe I have the pattern correct - the pattern and spoke length match the information and diagram on the Grin length calculator - but I'm not sure about one thing, and would like to know before I go further.

This is a single-cross pattern. The hub has disc brake capability and the wheel will have a bit of dish because of that. I'll be using rim brakes, though. It's a front wheel. I'm lacing with all of the spokes heads outside the hub.

In which way should I be crossing the spokes? Does it matter? I currently have the spokes that angle towards the rear of the bike on the outside of the spokes that angle towards the front of the bike - as viewed when those spokes are "up" (between the hub and the top of the fork). This is true for both sides of the wheel. This "seems" correct to me when I think of how forces would be transmitted when braking or the wheel is moving on the road, but I'm not certain of this.

As for why I'm doing single-cross: it's what was suggested by reading the info. on Grin Cyclery's page, it allowed me to use the spokes I wanted while allowing them to be the same length for simplicity, and it allowed the spokes to be a little shorter and enter the rim at an angle closer to 90 degrees, which is more important with this hub since it's on the larger side.

Any suggestions would be appreciated. Thank you very much.

Kevin
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Old 04-28-16, 10:56 AM
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Dan Burkhart 
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Single cross sounds right for that combination. I've built a couple like that, and like you, built with all heads out. I don't believe it makes one bit of difference whether leading or trailing goes over or under. Just be sure to do them all the same and you're good.
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Old 04-28-16, 11:02 AM
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My R'off hub bike friday 406 rim so short spokes , are a woven 1 cross ..

R'off suggests, not weaving, but specified the 1 cross , Bi Fri stands behind their work, so It's not a worry.
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