Opportune thread! I've been mulling this question over for my Peugeot PKN 10. I currently have basically the same set up as you 52/42 up front, 13-24 in the back. There are a lot of options and I'm not sure which direction to go. Do I buy just a 38t Ring? 122mm BCD rings for the Stronglight 49D are getting hard to find. I could also throw on some TA Cyclotouriste outer and inner rings. I could also just get a new crankset to make changing rings easier in the future. What triple did you switch to Rocky Gravol? Was the switch pretty easy? Did you switch the FD too or are you still using the stock simplex?