I think a cool way to show how far someone has ridden could be done by having more things gradually build up in the jersey back pockets…
So if you ride up on someone (or get passed) that has ridden 100k for example, they would have a whole bunch of things (bananas, gels, jacket, tubes, etc etc) stuffed into their jersey pockets… I think that this would simulate being on a long ride… the longer you go in the real world the more stuff you take…
This could be a good and easy way to give people recognition as you seem them on course - rather than looking at how many ks they have done on the side board.