8-Ball Concave Bearing - Single or bulk discounts
If you are anything like me, you don't want to be messing around cleaning and fiddling with bearings when you could be playing yoyo!
These are good quality, budget friendly concave bearings. They spin well and are reasonably reliable. Best part, you can buy a pack of 10 and just swap them out when they eventually need maintenance (as all bearings do).
You can choose bearings with shields or without. The shields help keep debris from getting into the bearing and keeping them clean, but is more hassle when you do need to clean them. Otherwise they are the same bearings.