LOSI Promoto-MX 7075 Rear Swing Arm MX057 by GPM  [MX057]

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057
Price:
CAD$103.45
Brand:
GPM
Model:
MX057
GTIN:
4894538376586
Condition:
Brand New
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alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057"

Aluminum rear swing arm for Promoto-MX

This aftermarket rear swing arm is an RC-scale replacement made for LOSI Promoto-MX bikes, CNC machined from 7075 aluminum to add rigidity over stock plastic parts. The design accepts larger inner bearings, listed as 16x8x5, to reduce play at the swing pivot and help keep the chassis aligned during hard acceleration and cornering.

The arm fits as a direct swap for Promoto-MX rear swing components on compatible LOSI 1/4 models. Installation uses standard RC workshop tools and basic rear end teardown; confirm bearing seating and clearances before final assembly since the arm is sized for the larger inner bearing dimension noted above.

Packing includes

  • Rear swing arm - 1pcs
  • Bearing 8x16x5 - 2pcs

Original Name / Part No:

LOS264000

Compatible Models

  • LOSI-1/4 PROMOTO-MX MOTORCYCLE RTR, FXR-LOS06000
  • LOSI-1/4 PROMOTO-MX MOTORCYCLE RTR PRO CIRCUIT-LOS06002

Choose this 7075 aluminum swing arm when you want a firmer, more consistent rear pivot for LOSI Promoto-MX models; always double-check bearing types and fit during installation to match your setup and riding style.

Will this fit my LOSI 1/4 Promoto-MX RTR?

Yes, it is produced as a direct replacement for the Promoto-MX rear swing arm on the LOSI 1/4 PROMOTO-MX MOTORCYCLE RTR and PRO CIRCUIT models listed in the compatibility box.

Does the package include the larger inner bearings?

The packing list includes two 8x16x5 bearings, while the arm is sized for larger inner bearings specified as 16x8x5; check the bearing orientation and swap in the oversized inner bearings if your setup requires them.

What tools do I need to fit this arm?

No specialised tools are required beyond typical RC workshop items like hex drivers and a bearing press or drift for seating bearings cleanly.

Will this change the handling of my bike?

Yes, the stiffer 7075 aluminum arm reduces flex at the rear pivot which can improve consistency under power, but you should confirm final geometry and bearing choices to tune handling to your preference.

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