What brake pads do you use? If any

i have the standard ultegra cartridge pads that came with the bike. they are coming to the end of thier life, does anyone know if the koolstops will fit into the the same ultegra pad holder?

the ultegra, if a cartridge system, use the 'shimano system' for pads (almost the same as the campi but with a tiny fix screw), so ja, i'd say, go grab the shimano type pads and it'll fit. if you have to replace the the whole pad inclusive the fixing at the brake arm, you might want to go get yourself cartridges cheap first, to hold your desired pads.