Tekno RC 2.0 Internal Differential Gear Set. These optional differential gears are intended for the Tekno RC EB48 2.0, ET48 2.0, NB48 2.0 and NT48 2.0. Made with a larger pitch/tooth profile, these provide more resistance, making it less likely to ¡§diff-out¡¨ or be inconsistent on corner exit. Using these allow for less over-rotating or turning-in unexpectedly, and an increase in corner speed by allowing more throttle to be applied early in the corner. Package includes one differential gear set.