These FKD Litespeed bearings make quite a decent kit – they couple a smooth spin with included (but separate) bearing spacers and a precisely-made rubber shield on one side of each bearing. Install them into the wheels with the shield facing out, and be sure to clean the bearing and relubricate it on a regular basis for the best possible performance.
We know a lot of skaters nowadays ignore the spacers and remove the shields, but trust us on this – using both will keep the bearings running smoother for longer. And while we’re happy to take your money, these bearings are a bit more expensive than the average for a reason. Look after them!