Here are shimanos dura ace 7900 10 speed braze on down tube shifters superior dura ace quality means reliability and durability easily fit to down tube and secure firmly for assured shifting fully compatible with 10 speed drivetrains can be used with double or triple chainsets sis indexed system compatible comes complete with sp41 gear cables which are lubricated internally along their length with low friction silicon grease to reduce cable friction weight 76 grams a pair