Started experimenting with rim decals/tapes/stickers or what ever you are supposed to call them. I tried different color combinations, but white lettering against the grey rim looked the best.

Bright red/yellow/green might also work, but then you would want some of that color somewhere else on the bike too.

Anyway, I measured the rims and found out that the rims have about 10-11 millimeters of available space if you don’t want to deal with curved surfaces. I made the stickers according to the measurements so there is no need for bending or stretching the tape. I tried to find a grey to match the rim as well as possible so would not have to cut the letters separately. The font was selected to roughly match the Intruder / Boulevard logo font. I may end up changing it later.

The sticker sheet vector file

I’ve attached a PDF file that has the print material used. Use and modify how you wish.