RCS RC Model 687 Bearing have the lowest resistance. They are manufactured by Aircraft quality steel. Pre-lubricated to ensure its excellent performance! RC Ball bearings should always be your first upgrades, it reduces friction for less rolling resistance, and that means higher speed and longer the running times. RC Ball bearings hardly require maintenance and last a lot longer than stock Oilite bushings. This is 100% Brand new item and we can ship this item to worldwide.