The Better Bearing Kit squashes the myth of Abec ratings. A quality rubber seal helps prevent dirt and moisture from entering the bearing. Light grease in place of industry standard oil provides long-term lubrication. The precision chrome steel spacers are durable and will not compress under high loads, helping your wheels stay dialed by preventing bearings from seizing. These bearings don't say Abec, and Tilt doesn't want them to. If you want a fast, quality bearing that doesn't get crunchy with age, you'll want the Better Bearings.