c. 93 XT thumbshifters still in use on my main MTB. Also got a 94 cannondale tourer, original gears/brakes etc, which gets used almost every day, but prob doesn't count as road stuff lasts way longer than MTB gear.
Other stuff that's gone the distance: hope hubs, middleburn cranks, royce BB, marzocchi marathons - all c. '02, kona lava dome '96, magura louise brakes '05, all still in regular use

