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Injora Black Brass Steering Knuckle Set for TRX-4M Diamond Axles

Injora Black Brass Steering Knuckle Set for Injora’s +5mm Diamond Portal Axles

New from Injora is a Black Brass Steering Knuckle Set designed for their +5mm Portal Axle Set for the Traxxas TRX-4M. These add-on weights provide over 37g of additional mass to help keep your 1/18-scale rig planted and provide it with additional traction when climbing up and over obstacles.

This steering knuckle weight set is made of machined brass and features a flat black finish with exposed brass accents. The set includes all necessary installation hardware along with a bearing set.

This weight set is only compatible with Injora’s +5mm Diamond Portal Axles and will not work with other axle sets, including the stock TRX-4M axles.

Specs:

  • Part Number: 4M-104BKF-S
  • Material: Brass
  • Steering Knuckles Weight: 33g
  • Bearings Weight: 4.7g

This Brass Steering Knuckle Set is priced at $18.99 and is available at injora.com.

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Posted by in New Products on Tuesday, August 19th, 2025 at 1:16 pm

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