30/8T Reverse HD Steel Triangular Keyed Bevel Helical Cut Diff Gear w/ Spool Set for BRX70 / BRX90 Axle for BRX01


  • This is a HD steel reversed cut helical triangular keyed gear set made for the rear axle of BRX01. It has the AR44 style ring/pinion gear and locker but with a flipped diff design.

    Hardened steel 30T/8T helical bevel gear and input shaft and differential locker (spool) set.

    Suitable for counter rotating drivetrain with opposite spinning direction center driveshafts.


    • Hardened steel gears for maximum strength and durability, increased weight in the axle
    • Keyed spool to increase structural strength and to eliminate weakness of the three M2.5 screws
    • Tight tolerance of the diff locker and the axle shaft
    • Tight tolerance of the bevel gear and input shaft to increase efficiency in the drivetrain


    • 1x Reverse Cut Triangular Keyed HD Steel Bevel Gear 30T
    • 1x Reverse Cut HD Steel Input Shaft 8T
    • 1x Keyed HD Steel Differential Locker (Spool)
    • 3x M2.5 hardware

    Will fit:
    • Boom Racing BRX70/BRX90 PHAT Axle (Note: must be black color Third Member which fits reverse axle gear, red color Third Member will not fit)
    • AR44 style ring/pinion gear and locker with flipped diff feature

    Will not fit
    • Stock AR44 axle housing.