if you want to pick a bearing for you, either go with a brand you trust, or go for the cheapest bearings that we have on Thisissoul.com and just replace them when worn down

22mm buiten diameter
8mm binnen diameter
8mm breedte

onderdelen
- buitenring
- balletjes
- ball cage
- inner ring
- zegel

outer ring
the groove is called a raceway

bals.
the balles used to be a steel wire. cut in little pieces and then grinded to be round. this proces takes a couple of days.

abec
8.3m/s bij 80mm wielen en 30km/uur.
25.13cm is de omtrek van 80mm
330.28 rotaties/s
19817 rpm

25.000 rotaties / minuut
416.66 rotaties / seconden
251.33mm is de omtrek van 80mm wiel
104.72 m / s
376 km / u

ABEC 1 less than 25,000 rpm - 377km/h
ABEC 3 less than 32,500 rpm - 490km/h
ABEC 5 less than 37,000 rpm - 558km/h
ABEC 7 less than 43,000 rpm - 648km/h

ilq


zegel, zz, z
608 is open aan beide kanten
608 z is open aan 1 kant en gesloten aan de andere
608 zz is gesloten aan beide
608 2rs is 2 rubber seals


smering,
grease or oil.
grease will stay longer, but is slower
oil will dissapear sooner but is faster.


materiaal
hoe harder het materiaal hoe harder je skate
staal
roestvrijstaal
hybrid steel/ceramic
full ceramic

cleaning your bearings

spinnen vs gewicht
met gewicht is het een heel ander spelletje

how to taking a bearing out.

ABEC Rating

The short answer: Do not pay attention to the ABEC or wheel hardness metrics 

Skate bearings are kind of all the same nowadays. If you have a skate bearing, The way it functions and wears down has more to do with the material used and the way it is lubricated, then with the ABEC scale.

The ABEC scale is a way to measure the precision of the bearing. It was not however invented for inline skating but for machine equipment and it thus has no relevance for the performance of your bearing in your skate.

In general if you buy a  200-250 euro's range skate, then the wheels and bearings are always very good, so do not worry about it

How to get bearings out.

Skating in the rain.