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Tyre Size Table

To find the correct tyre for your bike the most important thing to be aware of is the diameter of your wheel and the width of your tyre. If you feel unsure which size you need, you can always use the size of your existing tyres as orientation.

There are different size notations that can be found on the sidewall of your tyre. In order to make everything as easy as possible for you, we´ve put the most common size notations in the table below. You can look up your notation and easily convert to one of the other size notations use.

Tyre sizes - mountainbikes
Bike type & wheelsize
in shop
Inches ETRTO alternative
notation
diameter width in inches width in mm diameter
MTB 20“ 20 x 1,9 - 2,25 47 to 57 - 406 -
MTB 24“ 24 x 1,75 - 2,4 47 to 63 - 507 -
MTB 26“ 26 x 1,5 - 2,6 40 to 65 - 559 -
MTB FAT 26 x 3,8 - 4,8 95 to 120 - 559 -
MTB 27,5“ 27,5 x 1,9 - 2,5 48 to 64 - 584 650B
MTB 27,5+ /B+ 27,5 x 2,8 - 3,2 67 to 79 - 584 B+
MTB 29“ 29 x 1,9 - 2,4 47 to 63 - 622 -
Tyre sizes - trekking- & citybikes
Bike type & wheelsize
in shop
Inches ETRTO alternative
notation
diameter width in inches width in mm diameter
Trekking /City 12“ 12 x 1,75 - 2,25 47 to 62 - 203 12 ½ x 1,75 to 12 ½ x 2 ¼
Trekking /City 14“ 14 x 1,5 - 1,75 38 to 47 - 288 14 x 1 5/8 x 1 3/8 or 350 x 38A, 350 x 42A
Trekking /City 16“ 16 x 1,5 - 2,1 40 to 57 - 305 -
Trekking /City 18“ 18 x 1,25 - 2,0 32 to 50 - 355 -
Trekking /City 20“ 20 x 0,9 - 2,25 23 to 57 - 406 -
Trekking /City 24“ 24 x 1,5 - 2,4 40 to 62 - 507 -
Trekking /City 26“ 26 x 1,0 - 2,5 25 to 64 - 559 -
Trekking /City 27,5“ 27,5 x 1,125 - 2,5 28 to 57 - 584 650 x 28B to 650 x 42B
Trekking /City 28“ 28 x 1 - 1,6 28 to 42 - 622 700x28C to 700x42C
Trekking /City 29“ 29 x 1,9 - 2,4 47 to 63 - 622 -
Trekking /City 27“ (old standard not used anymore) 27 x 7/8 – 1/14 22 to 32 - 630 27 x 7/8 to 27 x 1 ¼
Tyre sizes - road bikes, triathlon bikes and cyclocross bikes
Bike type & wheelsize
in shop
Inches ETRTO alternative
notation
diameter width in inches width in mm diameter
Roadbike and Triathlon 28 28 x ¾ - 1 1/8 18 to 28 - 622 700x18C to 700x28C
CX & Gravel 28 28 x 1 – 1,6 28 to 42 - 622 700x28C to 700x42C
Road Plus 27,5 x 1,5 - 2,6 35 to 47 - 584 650B
Tria 26“ (old) 26 x 1 18 to 23 - 551 650 x 18C to 650 x 23C