https://blog.model-train-help.com/2025/10/why-oo-scale-is-so-popular-and-where-it-really-shines.html?utm_source=rss&utm_medium=rss&utm_campaign=why-oo-scale-is-so-popular-and-where-it-really-shines Model railroads and model trains Thu, 30 Oct 2025 18:39:09 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://blog.model-train-help.com/2025/10/why-oo-scale-is-so-popular-and-where-it-really-shines.html#comment-86276 Thu, 30 Oct 2025 18:39:09 +0000 https://blog.model-train-help.com/?p=7051#comment-86276 Pendon is actually built to 4mm which is the same as OO but the track is 18mm which is closer than the 16.5. There is an even finer system which is P4/S4 with track at 18.83mm which is exact at 4mm to the foot

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