Actually it's a physics issue. I reasoned that if I carried more speed my tires could more easily bridge the spaces between the grooves. The fact that both my tires were flat is telling. It suggests that the dynamic of excessive vibration acting on the tires once I got off the smooth pavement is the cause of the mishap. I recall feeling like the bike just disintegrated beneath me before I fell. I tried to fight one law of physics with another law of physics but the law of physics can be very complicated and unpredictable. I fought the law and the law won.