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

55mm Ball-Top Cap and Spring Assembly for HPI Sprint

ADP055 is a 55mm plastic ball-top cap assembly intended for HPI Sprint touring cars, shipped as a 1pr kit with a 1.5mm coil spring, washers and mounting screws. It is engineered for accurate fitment and consistent preload where ball-top cap assemblies are used.

The assembly operates as a cap and spring unit rather than a sealed oil shock, delivering predictable preload characteristics and a straightforward ball-end pivot interface. It is suitable where weight and cost favour a plastic cap and where the 55mm length conforms to stock suspension geometry.

Fitting procedure: remove bodywork and wheels as required, replace the existing top cap and spring with the ADP055 components, secure the supplied screws and verify free articulation at the ball joint. Apply thread-lock to metal fasteners when recommended by the chassis documentation to maintain secure mounting.

Use ADP055 where a precise, cost-effective plastic ball-top cap assembly is required; confirm correct geometry and articulation on the HPI Sprint before track use.