bike rim

No you can’t because this is Just Conversation. I think you can use a unicycle rim on a bike here but definitely not a bike rim on a unicycle.

This is the fifth thread unicycle thread you have started in JC. There is another forum, Rec.Sport.Unicycling, with the express stated purpose of: The unicycling newsgroup and mailing list on the web! This is the place to ask any questions about unicycling.

But base on past posts in your other threads, you already knew that: