Skate Bearings Explained: ABEC Ratings, Sizes, Ceramic and What Actually Matters

Written for OurSkates. Reviewed and verified by Vincent Henry, 50x British National Champion and FISS Level 3 coach. Last updated July 2026.

No component in skating carries more mythology than the bearing, so let us start with the honest part: bearings matter less than your wheels, your frame and your boot. A brilliant bearing in a poor setup fixes nothing, and money usually does more good spent one level up. What bearings reward is not overspending but understanding, so here is what the numbers and labels actually mean.

What ABEC actually measures

ABEC is a tolerance standard from the Annular Bearing Engineering Committee, written for machine bearings, graded in odd numbers from 1 to 9. A higher number means the bearing is machined to tighter dimensional tolerances. That is all it means. The scale says nothing about the steel quality, the lubricant, the shields or how the bearing copes with the sideways loads skating produces, which is why a well-made lower-rated bearing from a serious brand routinely outperforms a cheap bearing stamped ABEC 9. It is also why skate brands have been walking away from the scale entirely and rating bearings their own way. Treat a big ABEC number on a bargain bearing as marketing, not measurement.

Sizes: 608 and the micro bearings

The standard skate bearing is the 608: an 8mm bore, 22mm outside diameter, 7mm wide, used across inline, quad and skateboard wheels. Speed skating also uses micro bearings, the 688 (16mm outside) and 698 (19mm outside), which are lighter and run more balls to spread the load. The catch is compatibility: micro bearings need wheels with matching micro hubs. Check what your wheels take before you order, and ask us if you are not sure.

Steel or ceramic

Quality steel bearings use hardened high-carbon chromium steel, and hardness is the point: soft steel in cheap bearings deforms under racing loads in ways you cannot detect by spinning the wheel in your hand. Ceramic bearings replace the steel balls with ceramic ones, which are harder still, resist corrosion, and wear more slowly, a genuine advantage in British wet. Whether ceramics make you faster is argued about honestly within the industry: the gains depend entirely on manufacturing precision, so a cheap ceramic is the worst of both worlds. Precision-made ceramics, like Bont's, earn their place on race day; budget ones are jewellery.

What actually makes a bearing fast

Steel quality, polishing, and lubricant. Bont polishes its bearings in two directions, coarse then fine, and ships them pre-loaded with light German racing oil rather than heavy grease, because grease protects but drags. And above everything: cleanliness. A clean, oiled, mid-priced bearing will embarrass a gritty expensive one every single time.

Shields and spacers

Metal shields (marked Z or ZZ) protect against dust but are often fixed in place. Rubber shields (RS or 2RS) come off easily, which makes cleaning practical, and that is why good skate bearings tend to use them. Bearing spacers, the small tubes between the two bearings in each wheel, keep the pair aligned and share the load between them, and they matter more the harder you corner.

Looking after them

After a wet session or when a wheel sounds gritty, service rather than replace: shields off, a proper bearing cleaner bath, dry fully, a drop or two of light oil, shields on. Skip the household oils, which gum. Done seasonally, bearings last years.

Browse our bearings, from hardened steel to ceramic race sets, pair them through the wheels guide, or contact us with your wheel model and we will confirm which size fits.