"riding at the limit" can best be described as "Aggressive or reckless riding to the point of nearly crashing".
Reconfigurable gadgets prompt second-speculating while at the same time riding at the limit—never a good thing. Pushing one of these bicycles as far as possible is the exciting convergence amongst science and game. Over 100 long periods of advancement in tires, brakes, motors, and now hardware cooperate to place you in peril and at the same time shield you from it.