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

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Aluminum 7075 Rear Swing Arm (Larger Inner Bearings) - GPM MX057
Price:
£55.40
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"

Heavy duty rear swing arm for Promoto-MX

This aftermarket rear swing arm is an RC-scale replacement for LOSI Promoto-MX machines, precision machined from 7075 aluminium to provide a firmer alternative to stock plastic parts. The arm is compatible with larger inner bearings sized 16x8x5, which reduces play at the pivot and aids consistent rear alignment under demanding riding conditions.

It serves as a direct replacement for Promoto-MX rear swing components on compatible LOSI 1/4 models. Installation requires common RC workshop tools and a basic rear teardown; confirm bearing fit and clearances before finishing assembly since the arm is designed 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

Select this 7075 aluminium swing arm to stiffen the rear pivot of LOSI Promoto-MX models; always double-check bearing types and install clearance to suit your gear ratios and riding style.

Will this arm sit in the same mounting points as the original?

Yes, it is produced as a direct replacement for the Promoto-MX rear swing arm for the compatible LOSI 1/4 models shown in the compatibility box.

What are the bearing size notes I should check?

The arm is designed for inner bearings of 16x8x5, while the packing list includes two 8x16x5 bearings; verify orientation and swap bearings if you require the stated oversized inner dimension.

Does switching to aluminium affect maintenance?

Aluminium is more durable but check for corrosion and ensure bearings are greased and seated correctly; periodic inspection is still recommended after heavy use.

Is there any special setup advice after fitting?

After fitting, confirm chain alignment, suspension travel clearance and that the pivot moves freely with new bearings; adjust as needed to restore ideal geometry.

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