Hairston - North Carolina's leading scorer - was charged with speeding and reckless driving last month after an officer said he was clocked doing 93 mph in a 65 mph zone.
Through his attorney, Hairston pleaded to 75 in a 65 and "reckless movements" Tuesday. Hairston did not appear in court.
He will pay a $40 fine and court costs.
UNC suspended Hairston indefinitely on July 28, hours after he was stopped on southbound Interstate 85. That marked the third off-court misstep this offseason for the junior, who was cited twice in the span of a month by authorities while driving a rental vehicle linked to a felon.