ILQ is a standard of measure used by K2. This is a series of new premium quality bearings. The level of precision used in the manufacturing process is so high that these bearings are on a level of their own when compared to the ABEC series. The use of highly resistant steel balls inside the bearing and a special gel, requiring virtually no maintenance, puts ILQ bearings leaps and bounds ahead of the competition.
SG (Speed Grease) is a standard used by Rollerblade. This brand of bearings was created to introduce their customers to the significance of using quality components in Rollerblade brand skates. SG bearings promise long-lasting durability with the aim of differentiating Rollerblade from its competition and offering an alternative to the ABEC standard.