A chromium steel six ball bearing in a re-designed nylon retainer. By increasing the ball size and using a premium retainer, there is less friction, and with act you get quicker acceleration, more speed and increase durability.
-Larger stainless steel balls, create for less friction and the same wheel RPM
-Less Friction =facter speed, longer roll
-Higher speed, quicker acceleration
-Greater strength and durability
-Newly redesigned reinforced nylon ball retainers
-Lubricated impregnated nylon retainers (holds the lube inside the retainer longer helping reduce friction
-Updated deep grove channel helps support the strength and tolerance of the Hard luck 6 ball 608 design.