Bones 'Reds' Bearings with FREE spacers (set of 8)

Bones 'Reds' Bearings with FREE spacers (set of 8)

14.99

Bones REDS are the best selling bearings in the U.S. Excellent bearings that are pre-lubricated with Speed Cream™ racing lubricant. Comes in a pack of eight, boxed, with instructions and sticker. With FREE spacers, as Bones no longer put some in the box...

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If you need great bearings that are the choice for thousands of skaters Bones are the ones to choose. Bones REDS are manufactured in China to Skate Rated™ specifications in a manufacturing facility dedicated to producing the highest quality skate bearings in China. They are inspected twice before being shiped to skaters and offer the greatest combination of performance , durability and low cost in the industry. Because they offer near Bones Swiss performance at a fraction of the cost, they have become the best selling bearing brand in the U.S.A. Single, non-contact, removable rubber shield for easy cleaning and less friction. High speed Nylon® ball retainer for greater strength and speed. Pre-lubricated with Speed Cream™ racing lubricant. Skate Rated™ clearances, tolerances, materials and lubricant provide the best performance and durability possible. What does 'Skate Rated' mean? read this from George Powell: The ABEC rating system has been around for the last 35 years. The purpose of the ABEC committee (Annular Bearing Engineers Committee) is not to test every manufacturer’s bearings and proclaim them good or bad, but to establish dimensions, tolerances, geometry, and noise standards for bearings in an attempt to aid industrial bearing manufacturers and users in the production, comparison and selection of bearings for general applications. However, since every bearing is used in a different manner and environment, bearings should be redesigned or “customized” for special uses (like skating). The ABEC rating system is not intended to be the only criteria used for selecting bearings for use in specialized applications like skating. It is only one of the tools a bearing designer can use if it is appropriate for the application. The ABEC rating system includes grades 1,3,5,7, and 9. The higher the ABEC rating, the tighter the tolerances are, making the bearing a more precision part. High precision and small tolerances are required for bearings to function at very high RPM, in products like high speed routers that must spin at 20 to 30,000 RPM. In an application like this, an ABEC - 7 or 9 bearing rating may be appropriate. However, a skateboard with 54mm wheels turning 20,000 RPM will be traveling about 127 MPH! Since virtually all skating is done under 30 MPH, the realistic maximum RPM your skate bearings will see is about 4700 RPM and probably 90% of skating occurs under 2000 RPM. Thus, very high precision is not required at skating speeds. The dimensions and tolerances controlled by the ABEC standards include the diameters and widths of the raceways, their shapes to some extent and the smoothness of the running surfaces. The ABEC rating system ignores side loading, impact resistance, materials selection and grade, appropriateness of lubrication, ball retainer type, grade of ball, the clearance between the balls and the races, installation requirements, and the need for maintenance and cleaning. All these bearing design requirements are very important to the performance of your skate bearing, even though the ABEC rating says nothing about them.