I have the same problem with dual purpose, (tubeless and non-tubeless) rims also. My solution is to carefully trim the Velox tape with a utility knife to the desired width. As stated above, Velox is not that sticky so I make it stickier with a thin coating of contact cement applied to the rim. This seems to work but these type rims are a PITA. Next t him I need rims, they will be standard ones.