Now, this doesn’t matter if you are running HO-Scale, large scale, or some other scale in between. Everyone should be test-rolling their cars by hand through the tightest corners, switches, and S-curves to ensure every car used on the layout can freely roll through the curves your particular layout is equipped with. Please don’t assume that just because the car was advertised as able to navigate a particular track radius, it can navigate any and all configurations of your track freely. You want the car to roll freely through the curves, not just navigate the curves. If the wheels even slightly rub on underframe rigging, gearbox, or underframe, this will cause a compounding problem when you have more cars connected. Truck binding or rubbing causes drag on the car, causing the car to tip, roll, and rock. When multiple cars are connected, the connected cars also rock from the effects traveling through the couplers. This creates additional binding on the couplers, creating a chain reaction on

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