Serpent have introduced new gear center differential set for the Spyder SDX4. This compact differential is the same as the front and rear diff, except for the spur gear. The durable and true composite 86T gear is included in the set, the others are optional. The differential uses 10T and 18T internal gears combined with a composite cross shaft and spring steel outdrives. The center gear differential will make the Spyder SDX4 even easier to drive, less aggressive on power, compared to the center-slipper.