Bicycle tire size chart

Tyre size conversion chart

Find the corresponding size for your bicycle tyre.

ETRTO: 37-622. 622 indicates the tyre’s inner diameter in millimetres. It must match the rim diameter exactly. 37 indicates the tyre’s nominal width in millimetres. It may vary within the limits compatible with your rim and bicycle.

Enter your tyre size

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Commercial size names may vary. To choose a compatible tyre, check the ETRTO inner diameter (the last three digits) and the width.

Bicycle tire equivalence chart
Tire	ETRTO	Inches	French size
20"	28-406	20 x 1 1/8
	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
	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
	28-451	20 x 1 1/8
	37-451	20 x 1 3/8 B.S.
26"	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
	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 26 x 2.20/2.25
	60-559	26 x 2.35
	62-559	26 x 2.50
	28-584	26 x 1 1/8 x 1 1/2	650 x 28B
	32-584	650 x 32B
	35-584	26 x 1 3/8 x 1 1/2	650 x 35B 650B
	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	650 x 42B
	20-590	650 x 20A
	25-590	26 x 1 1/8, 1 1/4 26 x 1 3/8 - 1 1/4	650 x 32A
	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 650
	37-590	26 x 1 3/8	650 x 35A 650
	40-590	26 x 1.50 28 x 1 3/8 x 1 1/2	650 x 38A
27"	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
	35-630	27 x 1 3/8
28"	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, 1 1/16	700 x 25C
	30-622	28 x 1.20	700 x 28C
	28-622	28 x 1 5/8 x 1 1/8	700 x 30C
	32-622	28 x 1 5/8 x 1 1/4	700 x 32C
	35-622	28 x 1 5/8 x 1 3/8	700 x 35C
	37-622	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
	60-622	28 x 2.35
	32-635	28 x 1 1/2 x 1 1/8	700 x 28B 770B
	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 15/8 x 11/2	700 x 40/42B