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

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE 7075 Alloy Chain Tension Rear Swing Arm (Larger Inner Bearings) - GPM MX057A
Price:
CAD$111.66
Brand:
GPM
Model:
MX057A
GTIN:
4894538391176
Condition:
Brand New
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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"

7075 aluminum rear swing arm for LOSI PROMOTO-MX

This rear swing arm is designed to fit LOSI PROMOTO-MX models and carries part number MX057A. Machined from 7075 aluminum, it replaces the original plastic arm to improve dimensional stability and extend service life during aggressive off-road and motocross use.

The arm accepts oversized inner bearings and the kit ships with matching 8x16x5 bearings to suit the hub interface. Fitting the alloy arm permits a small change in wheel travel (reported as +1mm in the original notes) while keeping compatibility with the stock chain tension adjuster.

Lengthwise mounting is adjustable so you can set chain tension quickly at the track or field. Supplied hardware covers the basic mounting and bearing fitment, reducing the need to source extra fasteners during installation.

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 builders and tuners working on 1/4-scale PROMOTO-MX bikes, the MX057A alloy swing arm gives a direct-fit metal alternative with larger bearing support and straightforward chain-tension adjustment, supplied with bearings and the basic hardware needed for fitting.

Will this arm match my PROMOTO-MX model code?

Check your bike against the compatibility list inside the product details. This item is matched to FXR-LOS06000 and FXR-LOS06002 models.

Are the bearings included for the hub?

Yes. The package contains two 8x16x5 bearings sized for the hub interface described in the listing.

Will I need extra bolts to fit it?

Basic mounting screws and lock nuts are included for typical installation; only uncommon custom setups may require additional fasteners.

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