Purpose / Fitment:
Designed to replace worn bearings and seals in the steering head/steering stem
Meant as a performance upgrade over loose ball-type bearings on some models, the manufacturer lists compatibility for a broad range of motorcycles (e.g. Aprilia, BMW F series, etc.)
Material / Specs:
Uses tapered roller bearings for better load handling and a smoother steering feeling
Seals are typically double-lipped to provide better exclusion of water and dirt, and improved grease retention
