Fahrrad Online Shop - Bikester
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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
InchesETRTOalternative
notation
 diameterwidth in inches width in mmdiameter-
MTB 20“20 x1,9 - 2,2547 to 57 -406-
MTB 24“24 x1,75 - 2,447 to 63507-
MTB 26“26 x1,5 - 2,640 to 65559-
MTB FAT26 x3,8 - 4,895 to 120559-
MTB 27,5“27,5 x1,9 - 2,548 to 64584650B
MTB 27,5+ /B+27,5 x2,8 - 3,267 to 79584B+
MTB 29“29 x1,9 - 2,447 to 63622-

Tyre sizes - trekking- & citybikes

Bike type & wheelsize
in shop
InchesETRTOalternative
notation
 diameterwidth in inches width in mmdiameter-
Trekking /City 12“12 x1,75 - 2,2547 to 62 -20312 ½ x 1,75 to 12 ½ x 2 ¼
Trekking /City 14“14 x1,5 - 1,7538 to 47 -28814 x 1 5/8 x 1 3/8 or 350 x 38A, 350 x 42A
Trekking /City 16“16 x1,5 - 2,140 to 57 -305-
Trekking /City 18“18 x1,25 - 2,032 to 50 -355-
Trekking /City 20“20 x0,9 - 2,2523 to 57 -406-
Trekking /City 24“24 x1,5 - 2,440 to 62 -507-
Trekking /City 26“26 x1,0 - 2,525 to 64 -559-
Trekking /City 27,5“27,5 x1,125 - 2,528 to 57 -584650 x 28B to 650 x 42B
Trekking /City 28“28 x1 - 1,628 to 42 -622700x28C to 700x42C
Trekking /City 29“29 x1,9 - 2,447 to 63 -622-
Trekking /City 27“ (old standard not used anymore)27 x7/8 – 1/1422 to 32 -63027 x 7/8 to 27 x 1 ¼

Tyre sizes - road bikes, triathlon bikes and cyclocross bikes

Bike type & wheelsize
in shop
InchesETRTOalternative
notation
 diameterwidth in inches width in mmdiameter 
Roadbike and Triathlon 2828 x¾ - 1 1/818 to 28 -622700x18C to 700x28C
CX & Gravel 2828 x1 – 1,628 to 42 -622700x28C to 700x42C
Road Plus27,5 x1,5 - 2,635 to 47 -584650B
Tria 26“ (old)26 x118 to 23 -551650 x 18C to 650 x 23C