What you need to know: 💜 Roller Skaters need 16 bearings- two in each wheel 💜Buy a roller skaters pack 1x16 or 2 x skateboard packs 2x8 💜it's usually easier to install bearings into softer / grippier wheels 💜Buy wheels and bearings from us at the same time and we will fit them for you 💜 we recommend you have a set of bearings in sets of wheels you use regularly 💜use better quality bearings in wheels with a more specific purpose (usually firm wheels) to get the most response from the wheel. 💜 Your axle size determines if you need 7mm or 8mm bearings. Very generally, most manufacturers use 8mm, some European ones particularly favour 7mm. Got a question? Ask below !