These are great! I once did a three month like bike trip through parts of China - at one point, I knew that my brakes were failing, and the next day involved a long, 8km segment of very curvy downhill. Eventually, my brakes gave out completely, but I still didn't want to walk it - at one point, I lost control and couldn't quite make the turn and skidded off the road - coming to a stop literally a couple of feet from the edge of a very steep dropoff. That was dangerous/stupid. Walked the rest of the way down.