The B5M 3-gear transmission provides the spec class racer with a lightweight/low rotating mass option to improve drivetrain efficiency. It features a smaller, lightweight top shaft which uses smaller diameter bearings for additional weight savings. It is also a great tuning aid for modified class racing on high-grip tracks because the gyroscopic effect of the motor is reversed, making the car stay flatter in the corners.
The 3-gear transmission for the RC10B5M requires the #91606 top shaft, #91607 gear box, #91604 gear cover, and either the #91602 black or #91603 blue motor plate.
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