Bearings	Qty
5 x 8 x 2.5 mm	2
5 x 9 x 3 mm	1
4 x 7 x 2.5 mm	2
6 x 10 x 3 mm	1
10 x 15 x 4 mm	12
Total	18

Ball bearings should always be your first upgrades; that reduce
friction for less rolling resistance, and that means higher speed and
longer the running times. Ball bearings hardly require maintenance
and last a lot longer than stock Oilite bushings.

Our Metal Sealed Yeah Racing Ball Bearings have the lowest resistance.
They are manufactured perciously by Aircraft quality stainless
steel. Pre-lubricated with light protection oil, not any grease to
ensure its excellent performance!