27 iso size 630 is an older size that was used for road bikes but since so many bikes were built with this size it is still readily available.
Bicycle tire sizes explained.
When it comes to choosing width there are two major factors at play.
However older english and french tire size dimensions are still used as well.
Nowadays bicycle tire sizes are all marked according to etrto european tire and rim technical organization standard.
Read the size carefully.
Sizes of 26 and 24 tubulars are not well standardized.
While the first number the diameter of the tire is most important in identifying size there s a little more to how tires are measured with a more globally unified approach.
International organization for standardization.
Between 18 622 and 25 622 there are tyres of 19 20 22 and 23mm section.
While you can find a variety of bikes with wheel sizes ranging from 16 to 27 5 inches the most common sizes include 26 inches 27 5 inches 29 inches and 700c.
A third type of tire size might appear on either a mountain or a road tire.
A tire size you might see on a mountain bike.
Nowadays bike tires are typically marked according to iso standard a system originally developed by etrto european tire and rim technical organization but older english and french tire size dimensions are still used as well use the data from the following tables to determine interchangeability and convert between iso etrto english.
Take the rim with you when buying a tire and vice versa.
Conversion tables for common bicycle tire sizes.
23c 25c and 28c their width in mm.
A tire size you might see on a road bike.
A hybrid of road and mountain tires cyclocross tires are labeled as 700c and have widths indicated in millimeters like road bikes yet are knobbie like mountain bike tires.
Road bike tires generally come in three widths.
The etrto size specification 37 622 indicates the width of 37 mm and the tire inner diameter of 622 mm.
The letter at the end of a tire size is a throwback to an old french system when the letters a b and c designated different inner tire diameters it does not stand for cm.
The table below lists most of the sizes of tyre that are likely to be found in the uk.
700x25c indicates a tire with a 700mm outer diameter and a 25mm width.
Sizes written as decimals such as 2 75 are different than sizes expressed as fractions such as 2 3 4.
29 x 2 3 indicates a tire with a 29 outer diameter and a 2 3 width.
Check out the following for 20 year old bike tires sizes explained.
Where you see a block of two or more compatible sizes having the same bead diameter you can assume that intermediate sizes exist that will also fit the same rim.
26 iso size 559 is the most commonly used size for modern mountain bikes and is also used by many hybrid bikes.
