HPI Sprint 55mm Ball-Top Cap and Spring ADP055 by GPM  [ADP055]

55mm Ball-Top Cap and Spring for HPI Sprint

ADP055 is a 55mm plastic ball-top cap assembly for HPI Sprint vehicles, supplied as a 1pr set that includes a 1.5mm coil spring, washers and fixing screws. It is intended as an aftermarket replacement where original-style ball-top caps are used.

This product is not a sealed oil shock; it functions as a cap and spring assembly to offer predictable spring preload and a simple pivot interface for ball-end top mounts. Use it where a lightweight plastic cap is acceptable and the 55mm length matches your car's original specification.

Fitment advice: remove the necessary body panels and wheels, swap the existing cap and spring with the ADP055 components, fasten the supplied screws and check articulation at the ball joint. Apply thread-lock to metal-to-metal fasteners if recommended in the chassis manual.

The ADP055 is a practical, cost-aware option for replacing ball-top cap assemblies; always confirm fit and movement on your HPI Sprint before competition use.