These are re-releases of popular Grade Up Option Parts.
Useable Chassis for the above gear sets.
15053: Type 3 Chassis.
15132: Type 5, Zero, and Super 1 Chassis. Gear ratio can also be changed to 3.5:1(Kit is set at 4:1)
15187: Super FM and Super TZ Chassis.
Suitable for cars equipped with small diameter tires such as the Fully Cowled Mini 4WD. Provides the smallest gear ratio, 3:5:1, for higher top speeds.
