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Almost all tires have their size written on them. Take a look at the side of your tire to ensure it.
If you have a city or tourism bike, you will probably see the letter “C” after the size numbers.
Compatibility
Tannus Armour is compatible with the clincher rims.
The correct Armour size is the same as the size of your tire, the only difference is that you will need a slightly smaller inner tube than normal.
