Boom Racing Complete Rear Assembled BRX70 Portal PHAT™ Axle

Regular price $119.99

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  • This is a complete set of rear assembled BRX70 portal PHAT™ axle set.

    The BRX70 axle is Boom Racing's narrow axle. This is a heavy-duty and narrow axle set designed for performance-based scale RC builds. Designed for both linked and leaf spring setups. Use this axle as a base for any custom builds.

    Packed with many desirable features; a heavy-weighted cast alloy axle housing for low CG, reversible axle bevel gear positions, leaf spring over and under axle (optional), detachable aluminum CNC truss, adjustable caster angle, and more.

    It uses top-quality drivetrain components that are heavy-duty and efficient, including a set of hardened steel triangular keyed AR44 axle gears (30/8T) and a pair of BADASS™ steel rear drive shafts for ultimate strength and durability.

    The portal gearbox is designed with four heavy-duty hardened steel gears each for strength and durability.

    Includes black color XT diff cover and black color third member unit (fits Reverse AR44 Helical Cut Bevel Gear for running Counter Rotating Center Drive Shafts usually used in the rear axle).

    • Width: 160.4mm / 6.31" pin-to-pin (BRX70 portal axle front and rear axles are the same width)
    • Requires 44mm / 1.73" wheel barrel clearance (to clear the entire portal gearbox)
    • Portal gearbox ratio: 1:1
    • Weight: 250g
    • Portal Gearbox Size:
      • Width: 23.5mm
      • Height: 30.5mm (21.5mm above shaft / 9mm below)

    • Additional 15mm / 0.59" ground clearance at the pumpkin over BRX70 straight axle
    • CNC aluminum portal knuckle & cover
    • BADASS™ heavy-duty steel front universal driveshafts and portal driveshafts for ultimate durability and strength for the axle drivetrain
    • Four heavy-duty hardened steel metal gears in each portal gearbox
    • Narrow axle setup for super scale builds and smaller 1/10 bodies
    • Cast PHAT™ axle housing - strong, durable, and heavy which keeps the CG low
    • Anti-twist steel brackets (0 deg) for added axle strength (optional 10 deg +ve caster available)
    • Reversible ring gear position in the housing and optional reversed AR44 gear for counter rotation center drivetrain setup
    • Triangular keyed AR44 (30/8T) high pinion gear & input shaft (optional overdrive and underdrive gears available)
    • Chassis Mounted Servo (CMS) and Axle Mounted Servo (AMS) setup option
    • CNC aluminum truss included for 3-Link and 4-Link setup
    • Detachable knuckle lever for Behind-The-Axle steering setup
    • Leaf spring over and under the axle housing
    • Compatible with PHAT™ Axle brake disc and caliper (requires optional adapter #BRPT005)
    • Adjustable caster angle for additional steering adjustability
    • High steering angle - over 45 degrees
    • Removable third member for 6x6 / 8x8 pass-thru option
    • Third member high pinion angle for better clearance
    • Counter rotation stainless steel steering link for quick adjustments
    • Full rubber sealed bearings
    • Full 12.9-grade hardware

    • 2x CNC Aluminum Portal Lockout #BRPT7023B
    • 2x CNC Aluminum Portal Cover #BRPT003
    • 2x BADASS Portal Rear Driveshaft #BRPT7023A
    • 2x BADASS Portal Shaft Spindle #BRPT007
    • 4x Hardened Steel Gear 20T
    • 4x Hardened Steel Gear 16T
    • 2x Anti-Twist (0 Deg) Steel Bracket (Left & Right) #BRPT004
    • 1x Cast Alloy PHAT Axle Housing #BRLC7024
    • 1x Cast Alloy XT Pumpkin Diff Cover #BRLC7088
    • 1x AR44 30/8T Triangular Keyed Hardened Steel Gear Set (Ring/Pinion Gear + Spool) #BR955020
    • 1x CNC Aluminum Truss #BRLC7004
    • 2x CNC Aluminum Link Mount #BRLC7005
    • 1x M3 Nyloc #BRASNUTM3
    • 22x Full Rubber Ball Bearings
    • 4x Washer
    • 5x Spacer D5X8X0.1 #BRASSPD5801
    • 2x E-Clip #BRASEC30
    • Full 12.9 Grade Screws

    When you receive the axle:

    Make sure to grease up the axle set. You can fill up the empty space with diff grease surrounding the bevel gear and input shaft.

    The gear positions are factory setup and should be ready to go. Rotate the drivetrain by hand for physical inspection.

    Install spacers accordingly between the center driveshaft and the input shaft to prevent input shaft from unnecessary slop.

    Optional Parts:
    • Anti-Twist (10 Deg Positive Caster) Steel Bracket (Left & Right) #BRPT004+10
    • Rear Skid Plate for BRX70/BRX80/BRX90 PHAT™ Axle #BRLC7086R
    • Classic Diff Cover for BRX70/BRX80/BRX90 PHAT™ Axle Black #BRLC7026
    • Steel Leaf Spring Channel w/ Shock Mount for BRX70/BRX80/BRX90 PHAT™ Axle (2) #BRLC7010
  • Color: Black
  • Package total weight: 309.50 grams (incl. packaging)
  • Package size: 9.00 x 24.00 x 8.00cm
  • Factory description: Boom Racing Complete Rear Assembled Portal Axle for BRX70
  • Manufactured by Boom Racing
  • Manufacturer number: BRPT7023