I can’t remember who I used in 2011, could have been gravity. Either way the bikes were pretty fcked and they were the best I could find looking around in La Paz. There were 2 ways that were offered. At the stop where the buses stop off, you either coasted down the new main road for a bit ~15-20km or something with all the other rooks, or you jump off the side of the highway and head down the valley for 20 odd km of near pedal free cruising, downhill but not DH. Was pretty fun, flying through villages dodging animals and getting chased by dogs. Then you meet up with the other riders, from memory it’s kind of sh1t for a while so you bus to another area where it joins up with the old death rd. Some bike tours everybody just rides the whole way, I can’t remember exactly how things worked, but I was happy to be in the bus. What else, hmm, avoid the main square if you hear automatic gun fire, and turned out Route36 was a street away from the hostel.