The patented Rolling Road System features a custom-made guiding wheel technology that guarantees the best running characteristics for all locomotives. Carbon dust originating from a locomotive's carbon pick-up brushes or the burn off of ambient dust as carbon deposits/dust can be removed easily from the stainless steel guiding wheels by dipping them into cleaning fluid or by vacuuming. Just use a single drop of oil to coat the guiding wheels after cleaning. This design is superior to ball bearing units. Wheel supports are firmly positioned on the tracks, even in curves. Repositioning is so easy. A highlight of this design is the 3°- tilt of the guiding wheel surface according to NEM (European Model Railroad Standard) standards.