Velox is .020-.021" (0.5mm)
Does anyone how thick alternatives are?
Surprisingly a web search doesn't turn up any actual numbers, just weights and suggestions that Rox, Zipp, plus packing tape are "thin."
I ordered examples and will update with measurements from Zipp, Ritchey, and Rox as they arrive.
I just built wheels using the tightest rims I've encountered (a Continental GP4000 with one bead in the center won't rotate with no rim tape installed) and need thinner tapes.
Velo Plugs did not ease the situation to allow tool-less mounting like when I built some wheels using Kinlin XR300s, and yes I'm starting at the rim joint and ending at the valve which provides a little more breathing room.