Cycle Tyre Sizes

Bicycle tyre sizes can sometimes be confusing, especially when you are trying to source vintage tyres.

Generally, they are available in about 5 main groups.

12 – 24″
26″
27″
29″
700c

Within bicycle tyre sizes / types there are various subgroups – depending on the bike you are using, the terrain you will be cycling on and the season. These are: City / Urban Tyres, Cyclocross Tyres, Freeride & Downhill Tyres, Mountain Bike (MTB) Off-Road Tyres, MTB Slick Tyres, MTB Tubeless Tyres, Road Race Tubular Tyres and Road Race Tyres

An example of mountain bike tyre sizes is as follows:

Metric ISO
SECTION-DIA
26 x 1.0 25-559
26 x 1.25 32-559
26 x 1.5 40-559
26 x 1.75 47-559
26 x 1.9 50-559
26 x 2.125 57-559