M40S Assembled Pro Differentials w/ Metal Gears Adapters Dual ball bearings improve performance

Dual ball bearings improve performance and reliability while adjustable timing allows for adjustments to compensate for different drivetrain configurations that require reverse motor rotation

2 transmitters/radios

impact-absorbing front and rear bumpers with LEDs

High-impact case material

Models available in two color schemes: #20180 Black and yellow

M40S Assembled Pro Differentials w/ Metal Gears Adapters Dual ball bearings improve performanceFor ultimate power delivery and improved durability. This is a must have option for the M40 series. A direct replacement over the old plastic differential gear set allows you to use a faster motor and more powerful batteries without damaging your drivetrain. Comes fully assembled with grease installed. Fits Carisma models: M40S, M40B, M40DT, M48S.