Bones Super Swiss 6 Ball Bearings (SS6) are fundamentally different from our famous Bones Swiss. Super Swiss come with 6, 3/16 inch balls instead of 7, 5/32 inch balls used in most 608 bearings. Thus, the SS6 balls are 20% larger and roll fewer times to go the same distance. Like bigger wheels on a car, they create less rolling friction and have a higher top speed. SS6's special design and Swiss quality materials enable it to accelerate quicker, roll faster, and resist the impact of skate trick landings better than standard designs. The advantage of this design is higher speed, faster acceleration, greater strength and durability. Blue on one side. Engineered for skating.