1975 Tomos 3k tires

Martin Aikens /

the tires on the moped are 20 inch by 2 inch, but the rim is 16 inches. I was wondering if it is an old standard on older models to have the tire size stated by outer diameter not rims size.in other words do I need to buy a 16 inch tire due to new standards or do I need a 20 inch tires.

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