The Shimano Dura-Ace ST-7801 is the right-hand dual control lever from the 7800 series, designed for 10-speed road bicycles with drop bars. It integrates shifting for the rear derailleur and braking in one unit, using STI technology. This shifter suits riders restoring or maintaining older 10-speed Dura-Ace 7800-equipped road bikes. It pairs with Shimano 10-speed rear derailleurs like RD-7800/7801, cassettes CS-7800, and 10-speed chains. Made of aluminum in silver finish, it installs on standard 31.8mm drop bars with a 5mm Allen key for the clamp. Choose it for vintage racing bikes or upgrades needing reliable 10-speed indexing without modern Di2 complexity.