For TRAXXAS TRX4 Front Knuckle Inner Arms TRX4021 by GPM  [TRX4021]

Precision CNC Machined Knuckle Inners for TRX4

This technical inner knuckle arm set is produced for TRAXXAS TRX4 Trail Crawler platforms to support steering geometry and ensure correct engagement of internal knuckle gears. Components are CNC machined from 6061 T6 aluminum and finished with a 3D streamlined process to provide close dimensional control and a predictable metal-to-metal interface for upgraded durability.

The assembly includes inner knuckle parts and stainless steel fasteners intended as a replacement for factory plastic components where enhanced stiffness and wear resistance are required. Consult manual numbers 8252 and 8251 for correct part orientation and service matching during fitment.

From a tuning perspective, these aluminum inners reduce deflection in the steering assembly and will influence front pinion and spur alignment. After installation, set and verify gear mesh, axle geometry, and wheel alignment to maintain reliable gear engagement and consistent steering response on technical terrain.

Specify these CNC machined inners for precision upgrades where dimensional accuracy and reduced assembly flex are priorities in trail and crawler setups.