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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, with that you get quicker acceleration, more speed and increased durability.
-Larger balls, create less friction and the same wheel RPM
-Less Friction =faster 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.