HPI Baja Front Lower Arm Ball Replacements BJ055/BALL by GPM  [BJ055/BALL]

Front lower arm ball replacements

This set of hardened steel balls is a replacement option for HPI Baja alloy front lower arm assemblies. The balls act as the rolling contact inside the lower arm joint and are supplied as an aftermarket spare under model BJ055/BALL for maintenance or part renewal.

Fitment reminder: intended only for HPI Baja front lower arms that use removable steel ball elements. Always confirm the seat form and dimensions on your arms before fitting to other arm types.

Installation notes: remove the existing balls, inspect the seat and bore for wear or distortion, press the new balls into place and move the arm through its full travel to ensure free movement. Use light lubricant only if recommended by the original assembly instructions, and check for any unwanted play.

Service effect: replacing worn steel balls restores the correct contact geometry at the front lower arm pivot, helping to reduce steering play and keeping suspension articulation consistent. Use these parts as part of routine upkeep rather than as upgrades.