LOSI PROMOTO-MX 7075 Alloy Chain Tension Rear Swing Arm by GPM MX057A  [MX057A]

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A
Price:
USD$79.90
Brand:
GPM
Model:
MX057A
GTIN:
4894538391176
Condition:
Brand New
1 Reviews
Write a review
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A"

Rear swing arm for LOSI PROMOTO-MX

This is an RC-scale rear swing arm designed for LOSI PROMOTO-MX platforms, produced by GPM as part number MX057A. Machined from 7075 aluminium, the component replaces the stock plastic part with a metal alternative intended for improved dimensional stability and longer wear life in off-road riding conditions common to 1/4-scale motocross models.

The arm is prepared for oversized inner bearings and the package includes matching bearings, allowing the hub interface to accept larger 8x16x5 bearings supplied with the kit. Installation allows a small, controlled adjustment of wheel travel (noted as +1mm travel in the source), and the swing arm is compatible with the stock chain tension adjuster so you can retain the original tensioning method while benefiting from the alloy part.

Lengthwise installation is adjustable to set chain tension quickly, making on-track or field tuning faster. The included hardware covers basic mounting and bearing fitment so the arm can be fitted without sourcing additional fasteners.

Packing includes

  • Rear Swing Arm - 1pcs
  • Bearing 8x16x5 - 2pcs
  • Grade 12.9 black Cap Head Screws 3x18 - 2pcs
  • 4.0 Lock nut - 2pcs
  • 3.0 Lock nut - 2pcs

Original Name / Part No:

LOS264000

Compatible Models

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

For hobbyists maintaining or upgrading a LOSI PROMOTO-MX 1/4-scale bike, this GPM MX057A rear swing arm provides a direct-fit alloy alternative with larger bearing support and straightforward chain-tension adjustment, supplied with the necessary bearings and hardware for installation.

 

Product Reviews
1 Reviews
rating
very impressed with your products . the alloy bash plate, sump guard , rear swingarm and knuckles [ball bearing throughout ] for my losi promoto all fitted perfectly . the machining is impeccable , no damaged threads or scratches . delivery in under two w

Will this swing arm fit my PROMOTO-MX RTR?

This part is listed as compatible with FXR-LOS06000 and FXR-LOS06002 PROMOTO-MX RTR models; check your model code against the compatibility list before ordering.

Are bearings and hardware included?

Yes, the package includes two 8x16x5 bearings and the listed screws and lock nuts needed for mounting.

Does this use the original chain tension adjuster?

The design is compatible with the original chain tension adjuster, allowing you to retain the stock tensioning method while using the alloy swing arm.

What is the material and bearing size?

The arm is machined from 7075 aluminium and the kit includes two 8x16x5 bearings for the pivot/hub interfaces.

Copyright © 2008-2026 rcjaz.com All rights reserved