The Drive Built-In Spacer skateboard bearings from R.A.D. feature a full built-in spacer system, which means if you ever need to replace one bearing you won't necessarily have to grab or buy another built-in spacer, these are compatible with other bearings as the spacer is only attached to one. If that makes sense.
Also they're fast.
- Set of 8 Bearings
- ABEC 7
- Built-in Spacers
- Removable outer shield with an open inner shield for increased roll speed and easy cleaning
ABEC 7 - The ABEC scale is essentially a measurement of bearing tolerance for high precision bearings as dictated by the Annular Bearing Engineering Committee (ABEC). The scale runs from ABEC 1 through ABEC 9 using odd integers only. Essentially, the higher up on the scale a bearing is rated the tighter the tolerance is.
Tighter bearing tolerance means that the bearing moves with less resistance at high speeds, giving you a bit more roll for your push. In general most ABEC 3 or ABEC 5 bearings have steel races (shell of the bearing) with hardened steel ball bearings, and most ABEC 7 or ABEC 9 bearings feature steel races with super hard (much harder than steel) ceramic or titanium bearings.
Built-in Spacers - Built-in spacers allow you to tighten the axle all the way to ensure the bearings stay parallel in the wheel.