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

Lower arm ball set for front suspension

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

Fitment guidance: these balls are suitable only for HPI Baja front lower arms that use removable steel ball elements. Confirm the ball seating type on your arms before attempting to fit them to other designs.

Fitting steps: extract the old balls, check the mating surfaces for wear or deformation, press in the new balls and cycle the arm across its travel to verify smooth movement. Use lubricant only where the original build specifies it, and ensure there is no excess play after installation.

Service note: replacing worn balls helps restore correct contact geometry at the pivot, reducing steering looseness and maintaining predictable suspension movement. Treat these as regular service parts rather than performance parts.