Created 4 tags for my car Tyres. Un-screw the dust cap, put the tag over the filler-valve-thing- an put the dust cap back on. The abbreviations is in Danish language:
VF = Left Front (Danish: Venstre Foran)
HF = Right Front (Danish: Højre Foran)
VB = Left Rear (Danish: Venstre Bag)
HB = Right Rear (Danish: Højre Bag)
So for non-Danish speaking folks, use this as inspiration....
Use a florucent yellow color, so you remember to remove the tags from the tyres :-)
Use the OnShape.com CAD tools, using a "Stencil" font, and just extruded the surroundings.
Making the text rather visible.