The brand Bones is like the Holy Grail in bearings. All the brand's bearings are high quality bearings. The Bones bearings models are, ordered from high to highest quality: Bones Reds, Bones Super Reds, Bones Swiss and Bones Swiss Ceramics. All these models are a quality label on itself and that's why an ABEC indication is not applicable. (ABEC is an industrial standard to indicate the rate of roundness of the little balls in a bearing, but other things are important too for the overall quality of a bearing.)
The Bones Reds bearings are the excellent choice for who wants high quality bearings for a very affordable price.
The Bones Reds Big Balls are the newest member of the Bones Reds family. They are engineered to roll faster and last longer by using 6, 17% larger balls, like the legendary Bones Super Swiss 6 bearings. These larger balls let you roll faster, and keep rolling right through dirt that slows smaller balls down.