Tyre sizes

In Europe the following methods are used to indicate the tyre size:

The size in mm according to the European ETRTO standard, for example 47—622, where the first number indicates the width of the inflated tyre and the second the inside diameter in mm.
The size in inches with two numbers, for example 28″ × 1¾″, where the first number indicates the outside diameter of an inflated tyre in nominal inches and the second number indicates the height from the bead to the top as well as the width.
The size in inches with three numbers, such as 28″ × 1?″ × 1?″. In this case the second number is the height and the third number is the width.

The European ETRTO standard has been used in the industry since the 1980s, but is only slowly being carried through to general parlance. Old indications usually cannot be translated into metric sizes.

Have you found the correct size? Then check out our tires and tubes here.

	ETRTO	Inch	French
7"	47-93	7 x 1 3/4
8"	47-94	20 x 47-50 8 x 2
	50-94	200 x 50
	54-110	8 1/2 x 21/8 8 1/2 x 2
	32-137	8 x 2 8 x 1 1/4
10"	54-152 44-194	10 x 2 10 x 1 5/8
11"	47-222	11 x 1 3/4
12"	47-203	12 1/2 x 1.75 12 1/2 x 1.90
	50-203	12 x 2.00
	54-203	12 x 1.95
	57-203	12 1/2 x 2 1/4 R
	62-203	12 1/2 x 2 1/4
	32-239	12 1/2 x 1 3/8 x 1 1/4	300 x 32A
	57-239	12 1/2 x 2 1/4	300 x 55A
14"	57-251	14 1/2 x 2 1/4	300 x 55A
	47-254	14 x 1.75 14 x 1.90
	50-254	14 x 2.00
	40-279	14 x 11/2	350 x 38B
	37-288	14 x 1 5/8 x 1 3/8	350A 350A Confort 350A Ballon 350A 1/2 Ballon 350 x 32A
	40-288	14 x 1 5/8	350 x 38A
	44-288	14 x 1 5/8 x 1 3/8	350A 350 x 42A
	32-298	14 x 1 1/4	350A 350 x 32A
16"	40-305	16 x 1.50
	47-305	16 x 1.75 16 x 1.90
	50-305	16 x 2.00
	54-305	16 x 1.95 16 x 2.00
	57-305	16 x 2.125
	40-330	16 x 1 1/2	400 x 38B
	28-340		400 x 30A
	32-340	16 x 1 3/8 x 1 1/4	400A 400 x 32A
	37-340	16 x 1 3/8	400 35A 400A Confort 400A Ballon 400A 1/2 Ballon
	44-340	16 x 1 5/8
	28-349	16 x 1 1/8
	32-349	16 x 1 1/4 NL
	35-349	16 x 1.35
	37-349	16 x 1 3/8
17"	32-357	17 x 1 1/4
17"	32-369	17 x 1 1/4
18"	28-355	18 x 1 1/8
	35-355	18 x 1.35
	40-355	18 x 1.50
	47-355	18 x 1.75 18 x 1.90
	50-355	18 x 2.00
	37-387	18 x 1 3/8
	40-387	18 x 1 1/2
	28-390	18 x 1 1/8	450 x 28A 450A
	37-390	18 x 1 3/8	450 x 35A 450A 450A Confort 450A Ballon 450A 1/2 Ballon
	55-390		450 x 55A
	57-390		450 x 55A 450A
	37-400	18 x 1 3/8
20"	54-400	20 x 2 x 1 3/4 20 x 2 F 4J
	28-406	20 x 1.10
	32-406	20 x 1.25
	35-406	20 x 1.35
	37-406	20 x 1 3/8
	40-406	20 x 1.50
	42-406	20 x 1.60
	44-406	20 x 1.625
	47-406	20 x 1.75 20 x 1.90
	50-406	20 x 2.00
	54-406	20 x 2.00
	57-406	20 x 2.125
	60-406	20 x 2.35
	54-428	20 x 2.00
	40-432	20 x 1 1/2
	37-438	20 x 1 3/8	500A
	40-438	20 x 1 3/8 x 1 1/2	500 x 38A
	28-440		500 x 28A 500A 500A Standard
	37-440		500 x 35A 500A Confort 500A Ballon 500A 1/2 Ballon
	40-440	20 x 1 1/2 NL	500 x 38A
	28-451	20 x 1 1/8
	37-451	20 x 1 3/8 B.S.
22"	44-484	22 x 1 5/8 x 1 1/2
	25-489	22 x 1.00
	37-489	22 x 1 3/8 NL
	40-489	22 x 1 3/8 x 1 1/2
	50-489	22 x 2.00
	28-490		550 x 28A 550A 550A Standard
	32-490	22 x 1 3/8 x 1 1/4	550 x 32A 550A
	37-490	22 x 1 3/8	550 x 35A 550A Confort 550A Ballon 550A 1/2 Ballon
	37-498	22 x 1 3/8 x 1 1/4
	32-501	22 x 1 1/4
	37-501	22 x 1 3/8
24"	40-507	24 x 1.50
	44-507	24 x 1.625 24 x 1.75
	47-507	24 x 1.75 24 x 1.85/1.90
	49-507	24 x 1.85
	50-507	24 x 1.90/2.00 24 x 2.00 24 x 2.125
	54-507	24 x 2.10
	57-507	24 x 2.125 24 x 2.00
	60-507	24 x 2.35
	62-507	24 x 2.40
	23-520	24 x 7/8
	44-531	24 x 1 5/8 x 1 1/2
	40-534	24 x 1 1/2
	25-540	24 x 1.00
	32-540	24 x 1 3/8 x 1 1/4 24 x 1 3/8
	37-540	24 x 1 3/8
	40-540	24 x 1 3/8 x 1 1/2
	22-541
	25-541		600 x 25A
	28-541		600 x 28A 600A 600A Standard
	32-541	24 x 1 3/8 x 1 1/4 NL	600 x 32A
	37-541		600 x 35A 600A Confort 600A Ballon 600A 1/2 Ballon
25"	57-520	25 x 2.25
26"	25-559	26 x 1.00
	28-559	26 x 1.10
	35-559	26 x 1.35
	37-559	26 x 1 5/8 x 1 3/8 26 x 1.40
	40-559	26 x 1.50
	42-559	26 x 1.60
	44-559	26 x 1.625 26 x 1.50/1.75
	47-559	26 x 1.75 26 x 1.85/1.90
	50-559	26 x 1.90 26 x 1.95 26 x 1.90/2.00 26 x 2.00/2.10
	54-559	26 x 1.95 26 x 2.10 26 x 2.125
	57-559	26 x 2.125
	57-559	26 x 2.20/2.25
	60-559	26 x 2.35
	62-559	26 x 2.40 26 x 2.50
	20-571	26 x 3/4	650 x 20C
	23-571	26 x 7/8	650 x 22C
	40-571	26 x 1 1/2 CS 26 x 1 3/8 x 1 1/2 NL 26 x 1 5/8 x 1 1/2	650 x 35C 650 x 38C
	47-571	26 x 1 3/4 650 CS Confort	650 x 45C
	54-571	26 x 2 x 1 3/4	650 x 50C
	28-584	26 x 1 1/8 x 1 1/2	650 x 28B
	32-584		650 x 32B
	35-584	26 x 13/8 x 11/2	650 x 35B 650B Standard
	37-584	26 x 1 1/2 x 1 3/8 26 x 1 1/2	650 x 35B
	40-584	26 x 1 5/8 x 1 1/2 26 x 1 1/2	650 x 35B 650 x 38B
	44-584	26 x 1 5/8 x 1 1/2	650 x 42B 650BSemi-Confort 650B 1/2 Ballon
	54-584	26 x 1 1/2 x 2
	20-590		650 x 20A
	25-590	26 x 1 1/8 x 1 1/4 26 x 1 3/8 x 1 1/8 - 1 1/4	650 x 25A
	28-590	26 x 1 1/8	650 x 28A
	32-590	26 x 1 1/4 26 x 1 3/8 x 1 1/4	650 x 32A
	35-590	26 x 1 3/8	650 x 35A
	37-590	26 x 1 3/8	650 x 35A 650A
	40-590	26 x 1.50 26 x 1 3/8 x 1 1/2	650 x 38A
	44-590
	32-597	26 x 1 1/4
27"	40-609	27 x 1 1/2
	20-630	27 x 3/4
	22-630	27 x 7/8
	25-630	27 x 1.00 27 x 1 1/16
	28-630	27 x 1 1/8 27 x 1 1/4 Fifty 27 x 1 1/4
	32-630	27 x 1 1/4
	28/32-630	27 x 1 1/4
	35-630	27 x 1 3/8
28"	18-622	28 x 3/4	700 x 18C
	19-622		700 x 19C
	20-622	28 x 3/4	700 x 20C
	22-622	28 x 7/8	700 x 22C
	23-622	28 x 7/8	700 x 23C
	25-622	28 x 1.00 28 x 1 1/16	700 x 25C
	26-622	28 x 1.00	700 x 26C
	28-622	28 x 1.10 28 x 1 5/8 x 1 1/8	700 x 28C
	30-622	28 x 1.20	700 x 30C
	32-622	28 x 1.25 28 x 1 5/8 x 1 1/4	700 x 32C 700 COURSE
	35-622	28 x 1.35 28 x 1 5/8 x 1 3/8	700 x 35C
	37-622	28 x 1.40 28 x 1 5/8 x 1 3/8	700 x 35C
	40-622	28 x 1.50 28 x 1 5/8 x 1 1/2	700 x 38C
	42-622	28 x 1.60	700 x 40C
	44-622	28 x 1.625	700 x 42C
	47-622	28 x 1.75	700 x 45C
	50-622	28 x 1.90 28 x 2.00
	54-622	28 x 2.10 29 x 2.10
	57-622	28 x 2.10 29 x 2.10
	60-622	28 x 2.35
	32-635	28 x 1 1/2 x 1 1/8	770 x 28B 700 x 28B 770B COURSE
	40-635	28 x 1 1/2 28 x 1 1/2 x 1 3/8	700 x 38B 700 x 35B 700 Standard 700B Standard
	44-635	28 x 1 5/8 x 1 1/2	700 x 40/42B
	28-642	28 x 1 3/8 x 1 1/8	700 x 28A
	37-642	28 x 13/8	700 x 35A

Tyre sizes

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