Tannus Armour Size Guide

When you use Tannus Armour with an inner tube you need to use a slightly smaller tube than the size listed on the side of your tyre. The table below is a list of Armour sizes and the recommended inner tube size.

Important information if you are supplying your own inner tubes

If you already have inner tubes to use with your Armour inserts please check the table to make sure they are the correct size. Where a range of sizes is shown we always recommend that you use a tube at the smaller end of the range.

Armour size	Recommended Inner Tube Size
20" (1.75-1.95")	20" x 1 3/8"
20x(1.95-2.5), (50-63)-406	20" x 1.75"
Fat tyre 20" x 3-4"	20" x 2.5"- 3.5"
24x(1.95-2.5), (50-63)-507	24" x 1.75"
26x(1.6-1.9), (42-47)-559	26" x 1 3/8"
26x(1.95-2.5), (50-63)-559	26" x 1.75"
26x(1.95-2.1), (50-54)-559	26"x 1.5-2.1"
Fat tyre 26x4.0-4.8, (100-120)-559	26" x 3.0-3.5"
27.5x(1.95-2.5), (50-63)-584	27.5" x 1.5-1.95
27.5x(2.6-3.0), (65-75)-584	27.5" x 1.9-2.3"
700-(28-34), (28-34)-622	700 x 18-23C
700-(35-40), (35-40)-622	700 x 23-28C
700-(42-47), (42-47)-622	700 x 28-32C
29x(1.95-2.5), (50-63)-622	29" x 1.5-1.95"
29x(2.6-3.0), (65-75)-622	29" x 1.9-2.3"