Upgrade for TRAXXAS TRX4 Front Knuckle Inners TRX4021 by GPM  [TRX4021]

6061 T6 Knuckle Inner Arms for TRX4 Trail Use

This aluminium inner knuckle arm set is produced for TRAXXAS TRX4 Trail Crawler platforms to support accurate steering geometry and reliable internal knuckle gear engagement. Parts are CNC machined from 6061 T6 and finished with a 3D streamlined process to deliver tight fitment and a firm metallic feel appropriate for trail and rock crawling.

The kit contains inner knuckle pieces plus stainless steel fasteners intended to replace stock plastic hardware where greater stiffness and long-term wear resistance are desired. Reference manual numbers 8252 and 8251 when confirming part orientation or matching service items.

As a performance upgrade these aluminium inners will reduce steering flex and can affect pinion and spur alignment at the front axle. After installation, recheck gear mesh and wheel alignment to ensure smooth engagement and stable steering on rough terrain.

Select these aluminium inner knuckles for a metal alternative that helps maintain consistent steering under load and extends service life compared with plastic inners.