Originally Posted by
Ronno6
I believe that to be true-for the DS only.
Spoke angle WORSE on NDS, hence increasing dish.
Consider this: draw triangle defined by the points A B and C, where line AB is the OLD of the hub, and lines AC and BC are of equal length, the spokes of a dishless (for argument sake) rear wheel.
Now add a point, D on DS line BC, about as close to point C as you want. This is the nipple of DS spoke, but with a deep-V , non OCD rim.
Now, insert new NDS spoke from A to D. There is now dish, where there was none before. Had there been dish before, there would now more dish.
Correct?
Makes no sense at all to me. Point D isn't even on the rim. Your drawing is of a typical tandem wheel, with about equal dish on both sides. A deep rim moves C closer to the centerline of AB, thus increasing dish on both sides. You want more dish, not less. Also on the NDS you want more dish. Trying to make a more symmetrical wheel by decreasing NDS dish creates a weaker wheel. That's the reason you don't see hubs designed that way for ordinary use. If what I understand you to be saying were true, all hubs would have the flanges spaced equally from centerline. But they don't. That said, OC rims do build up stronger than symmetrical rims of the same depth, but that's because the DS spoke angle is less vertical, not that the NDS is more vertical. Some racing oriented rear hubs are designed to be more symmetrical to get the NDS spokes more out of the wind. Similarly, some racing front hubs are designed with flanges closer to centerline than usual. In general, the less vertical the spoke angle, the stronger the wheel.
However, spoke angle is a very minor part of why a deep rim is stronger. It's stronger because it's stiffer.