Changing the speed of the tires (either way) imparts a force into the chassis. The force can cause the chassis to rotate at up to a certain maximum speed (as determined by the relative masses of the tires/wheels vs. the chassis, the distance of the axles from the CoG, etc. etc.). The chassis rotating means it's spinning about an axis at a certain rate. That means it turns x degrees per y seconds. If you don't impart that force until you've been in the air for awhile, the 'y' is reduced, thus the x is reduced as well. The sooner you change your tire speed by braking or accelerating, the more you'll be able to rotate before you're back on terra firma.
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