Originally Posted by
Rob_E
I'm building up a few hub geared 20" wheels. The last one I did, given the large size of the hub and the small size of the wheel, a 2 cross was advised, and it worked out well. That was a 36 hole rim/hub. Now I'm rebuilding a 28 hole wheel (gear hub, 20" rim). .
There's very little difference between 2X and 3X on a properly tensioned wheel. I would go with 2X on a large-hubbed 20" wheel if only to avoid having spokes cross over the head of the adjacent spoke. A 3X places the furthest-out crossing farther out, which makes it easier to interlace the spokes.