What is the most popular train set gauge?
What is the most popular train set gauge? HO Scale. In the US HO is the most popular choice in model railroad scales. The HO trains represent US standard gauge trains and are 16.51 mm wide and 12.95 mm tall. The name comes from the fact that these HO scale models are half the size of O scale trains, which were once the most- popular scale type of model railway ...
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