I should clarify that I only experience this after acsending hundreds if not thousands of feet in a short time. The brakes are not hot when this happens, since I have not used them much, if at all, during the acsent. They have never failed to work, but they do take more pressure from my foot, and feel squishy. If I pump them up, or mash the pedal several times, it returns to normal feel. I assumed this was due to air pressure or atmospheric influence, or maybe the hoses can't contain the pressure as well. We are talking about high altitude trails and passes at 11000 to 14000 feet. Nobody else has experienced this?