A real adventure for bike enthusiasts... I would definitely recommend opting for the fancier 'full suspension' bikes as they are made for downhill riding and you will benefit from this on the longer, more rough 'death road' section of the tour. This does take some endurance so make sure you are in reasonably good shape and are fully acclimated to the altitude. Otherwise I thoroughly enjoyed this tour. Our guides were helpful and accommodating to everyones pace. Suites and helmets were provided.