Whats Shimano Flight Deck all about? There is a ribbon cable inside and what seems to be a button by the thumb of the shifter. What is it for? : r/bikewrench
Shimano 105 9-speed STI Shifters: ST-5500 Triple/Double 2066 - Bike Recyclery
USED Shimano 105 2/3x9 speed Double/Triple Road Shifter Levers Silver
Shimano right shifter ST-R500 8 speed Flight deck road bike | eBay