TRAXXAS E-MAXX Precision Alloy Knuckle Arms Front and Rear EMX2021 by GPM  [EMX2021]

Performance alloy knuckles for E-MAXX setups

This is a set of alloy front and rear knuckle arms made for the TRAXXAS E-MAXX platform, model EMX2021. Intended as either direct replacements or performance upgrades, these knuckles help correct wear-related play and create a stiffer steering feel for hobby monster trucks in the 1/8 scale range.

The knuckles locate steering hubs and transmit suspension loads into the uprights and geometry, while also shaping steering response when paired with varied turnbuckle lengths or shock valving. Swapping plastic knuckles for alloy reduces flex and delivers steadier inputs, which assists with tuning toe and camber behaviour under load.

To fit, disassemble the relevant hub assemblies, replace the factory knuckles with the alloy pieces and refit using the original hardware where suitable. Confirm ball stud engagement and check steering stops and suspension travel after installation. Apply a small amount of thread locker on metal fasteners if metal-to-metal contact is present.

A practical upgrade that improves steering repeatability and longevity; always check fit and recommended torque settings for your chassis before extended sessions.