I have two Peugeot mopeds in excellent condition that were built in 1972. They have Rigida rims size 15 - 2 1/4. I can't find tires anywhere. Can I go to a 14 inch and shave it? Does anyone have any ideas? Is re-rimming and re-spoking an option to go to a standard 16? Does anyone do that kind of work and can I do it myself? Yes, I'm certain of the size.