Hi all. Just joined and I can't seem to find an answer for my question. I have a 1972 G4TR (bought from original owner, 781 original miles!) that I recently got running. I want to use it as a learning platform for my grandkids, but I'd like to update it a bit. The one thing I want to do is switch to a 21" front wheel. I know it's a 36 spoke wheel, but I'm trying to determine what length spokes I'd need to lace up a new 21" rim. Most everything I find online is for more modern bikes that have a disc brake and use 2 different length spokes. Does someone know what length spokes I'd need or how I can go about determining this? Thanks!