I went to look at a bike over the weekend, turned it over and found these screwed in cable guides on the bottom bracket shell. The bike has Campy Athena on it and rides very well. It is supposedly a mid 90's bike (I know that's not exactly classic and vintage). What's up with these cable guides? Is there an plausible explanation and what does it indicate about the bike, if anything? Should I be concerned? This kinda threw me for a loop. The bike rides very well! Thanks for any info!