www.rollerskates.com

Bones Swiss Legendary Skate bearings Now Sold Individually!. Regular 608 bearings. Legendary Bones Swiss bearings have been the industry standard ever since they were introduced in 1983. Fast, smooth, and long lasting, these bearings have become the choice of most professional skaters, and remain unequaled in their class. Bones Swiss bearings feature the same ultra high performance components used in Bones Swiss Ceramic bearings, except that the balls are chromium steel instead of silicone nitride. Bones Swiss bearings have earned their fame through years of proven, dependable performance for the best skaters in the world. No hype, just the best... ask anyone who has been skating for a few years. SWISS BEARINGS?We are often asked, what 'ABEC rating' are your bearings? The answer is that all Bones Bearings are Skate Rated??? not ABEC rated. Bones Bearings are the skate industry leader and favorite choice of professional skaters, and have been since their development in 1983. During the past 18 years, Bones Swiss bearings have become legendary because of their superior speed quality, and longevity. Even though Bones Swiss bearings are the top rated bearing in skating, we don't give them an ABEC rating. There is a good reason for this... thank you for asking.  ABEC 99! :)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 To explain this another way, choosing an ABEC-7 or 9 bearing for skating would be like choosing an Indy car to race in the Baja 500 because Indy cars can go fast and are of high precision. It isn't that the Indy car isn't a good piece of equipment, just that it is not designed for off road use and so it would quickly fail when its suspension breaks and its engine clogs with dirt. Bones bearings out perform all other bearings because we went to the trouble to skate rate Bones Swiss??? and Bones REDS???, not just select an ABEC rated industrial bearing and put a customized plastic shield on it. Bones bearings have been completely redesigned for skating from the ground up and are built to Bones specifications that include skate rated components, lubricants, tolerances and clearances. Bones' component parts are engineered and tested to withstand the high impacts of hard landings, the high side loads of turningFeatures- Each package comes with set of bearings, pre-lubed with Speed Cream, instructions and a sticker.

• Now Sold Individually!.
• Inline Skates and Roller skates Require 16 bearings for full replacement
• The Original and best Swiss bearings
• 8 ball bearings
• Revovable Shields for cleaning
• 608 standard size
• Are you ready for a brand new set of Bones Swiss?