Promoto-MX Rear Arm Upgrade 7075 Aluminum MX057 by GPM  [MX057]

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057
Price:
NZD$125.50
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"

Rear arm upgrade for Promoto-MX

This aftermarket rear swing arm is an RC-scale replacement tailored to LOSI Promoto-MX motorcycles and machined from 7075 aluminium to give greater stiffness versus common plastic arms. The component is set up to accept larger inner bearings sized 16x8x5, lowering play at the pivot and helping maintain correct chassis alignment during rough riding.

Intended as a direct replacement for Promoto-MX rear swing parts on compatible LOSI 1/4 models, the arm installs with routine RC workshop tools after basic rear teardown. Verify bearing compatibility and clearances before completing assembly because the design assumes the larger inner bearing dimension referenced 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

Fit this aluminum swing arm when you need a more robust rear pivot for LOSI Promoto-MX machines, and double-check bearing fitment to suit your running preferences and tyre choice.

Is this compatible with the Promoto-MX PRO CIRCUIT RTR?

Yes, the compatible models list includes the Promoto-MX PRO CIRCUIT RTR and the arm is designed to match those LOSI 1/4 chassis points.

What is the benefit of 7075 aluminium here?

7075 aluminium offers higher stiffness and fatigue resistance compared with typical plastics, which reduces flex at the rear pivot and helps maintain consistent geometry under load.

How do the included bearings compare to the arm size?

The box contains two 8x16x5 bearings, but the arm is sized for 16x8x5 inner bearings; check orientation and replace or reorient bearings as required for correct clearance.

Will this require frame mods?

No frame modification is expected for compatible Promoto-MX models; standard removal of the rear assembly and reassembly with ordinary RC tools should suffice.

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