Master Airscrew Gear Box 3.0:1 RC Gearbox - MAS3030 EMR Livery 1/8 inch bore fits the

1/8 inch bore fits the motor shaft diameter used across multiple ARRMA brushless platform vehicles

Basic hobby tools for assembly and installation

eye-catching finish

Replacement shock bladders or O-rings if rebuilding worn units

Part number TRX11037 makes it straightforward to identify and reorder as a replacement component

Master Airscrew Gear Box 3.0:1 RC Gearbox - MAS3030 EMR Livery 1/8 inch bore fits theThe Master Airscrew 3030 gearbox is a 3. 0: 1 gear reduction unit for electric RC aircraft, allowing a faster spinning motor to drive a larger, lower revving propeller. This RC gearbox (part number MAS3030) steps motor output down at a 3. 0: 1 ratio, which lets you swing a bigger prop for more static thrust on power system setups that benefit from gear reduction rather than direct drive. It's a propulsion component aimed at modellers building or