How do you know when to replace the traction tires on a 4-8-4 steam engine? The tires like good but I am having trouble with one curve with one engine, the engine has older traction tires on it and the engine that works correctly has new tires on it, both the same style steam engine; an MTH Reading Lines T-1, one is cab # 2102 and the other cab # 2124. I have worked on the curve some with a dremel tool and grinder bit and tried to smooth the rails some but helped only a little. The engine derails at 22 scale MPH or faster, slower then that it goes through the curve correctly, however I need to keep the speed up to 33 MPH go through a Ross switch without stalling about 6 feet away from the curve.
Lee Fritz
