I made what I believe will be effective skids for our Catrike Roads out of heavy schedule PVC in about 30 minutes.
I took 2 inch pipe, crosscut a line about 80% down 3 inches from one end, then ripcut a half inch wide line through the the 3 inch section. I then cut two lines from the other end back to the original crosscut, centered opposite the ripcut line, so I was left with a 2 inch strip attached to the 3 inch ring. The PVC is flexible enough to spread the ring and let it snap over the trike tubing, forward of the outriggers. After aligning it you clamp the ring down with a hose clamp. The 2 inch strip is flexible enough to curve along the tubing and be clamped down. I made these 15 inches long, but a little longer might be better.