NiNja Precision Speed Bearings are the result of a dedication to design and manufacture the best skate bearings in the world. Engineered specifically for skating, NiNja Bearings provide maximum performance and resist wear better under the demands of skating. NiNja Bearings incorporate state of the art materials and are produced in the world's most advanced bearing facilities (ISO 9001) in Shikoku, Japan. Stringent standards for surface finish, ball quality, and cleanliness make NiNja Bearings the fastest, smoothest and quietest skate bearings ever produced.

Every Ninja ABEC bearing is tested at the final stage of the manufacturing process and must meet or exceed each and every ABEC standard, including noise fallouts. We absolutely guarantee that each and ever bearing we produce meets or exceeds the ABEC rating stamped on the shield, something our competitors cannot do. All feature rings cut from high carbon chrome bearing steel (SUJ2), a metal composition that for skating applications is superior to the SAE 52100 found in other brands. All feature AKS balls, ground and polished to perfection in our facilities.