I have a 105 double crankset (fc-5502, 53/39) with a 105 "10 speed" front derailleur and a 105 "ten speed" rear deraileur.
BUT, I have a 9 speed cassette. Also, everywhere I see the fc-5502 advertised, it says it's for a 9 speed setup -- there's no mention of 10 speed compatibility.
Is there any reason why I can't just put a 10 speed cassette/ chain on? Seems like I should be able to since f/r derailleurs are 10 speed...