I haven't yet had to replace a traction tire on my engine I have in my layout. I don't run trains that often, so my traction tires should last for a while, unless humidity can ruin them. As my trains are in my basement which usually has 45 to 55 % humidity, at least from what I recall seeing on my humidity monitor in the basement, sometimes peaking as high as 60%. Though I wonder if having the trains set on the track can possibly ruin the traction tires, but giving it a flat area.
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