Tyre size calculator

Equivalent sizes for the 275/45 R18 tyre

Sidewall height 124 mmDiameter 705 mm Circumference 2214 mmRevolutions/km 452

Approved rim widths according to ETRTO: 9" – 8,5" – 9,5" – 10" – 10,5"

To be approved, a tyre's diameter may differ by no more than 2 %. The vehicle's load and speed indices must also be respected.

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
245/55 R17	-0.47 %	99.5 km/h	—	8 models in stockFrom CHF 131.00 Summer1 Winter7

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
265/45 R18	-1.26 %	98.7 km/h	9" – 8,5" – 9,5" – 10"	2 models in stockFrom CHF 169.00 Winter2
245/50 R18	-0.32 %	99.7 km/h	7,5" – 7" – 8" – 8,5"	21 models in stockFrom CHF 133.00 Summer3 Winter12 All-season6
275/45 R18 Your size	0 %	100.0 km/h	9" – 8,5" – 9,5" – 10" – 10,5"	2 models in stockFrom CHF 186.00 Summer1 Winter1

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
265/40 R19	-1.41 %	98.6 km/h	9,5" – 9" – 10" – 10,5"	11 models in stockFrom CHF 146.00 Summer4 Winter6 All-season1
275/40 R19	-0.29 %	99.7 km/h	9,5" – 9" – 10" – 10,5" – 11"	30 models in stockFrom CHF 91.90 Summer14 Winter11 All-season5
245/45 R19	-0.22 %	99.8 km/h	8" – 7,5" – 8,5" – 9"	45 models in stockFrom CHF 87.90 Summer11 Winter22 All-season12
285/40 R19	+0.87 %	100.9 km/h	10" – 9,5" – 10,5" – 11"	12 models in stockFrom CHF 181.00 Summer4 Winter8
255/45 R19	+1.08 %	101.1 km/h	8,5" – 8" – 9" – 9,5"	26 models in stockFrom CHF 91.90 Summer3 Winter18 All-season5

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
305/30 R20	-1.95 %	98.1 km/h	11" – 10,5" – 11,5"	5 models in stockFrom CHF 194.00 Summer3 Winter2
265/35 R20	-1.59 %	98.4 km/h	9,5" – 9" – 10" – 10,5"	18 models in stockFrom CHF 177.00 Summer11 Winter7
275/35 R20	-0.58 %	99.4 km/h	9,5" – 9" – 10" – 10,5" – 11"	26 models in stockFrom CHF 90.90 Summer14 Winter11 All-season1
245/40 R20	-0.07 %	99.9 km/h	8,5" – 8" – 9" – 9,5"	38 models in stockFrom CHF 84.90 Summer20 Winter13 All-season5
285/35 R20	+0.40 %	100.4 km/h	10" – 9,5" – 10,5" – 11"	17 models in stockFrom CHF 171.00 Summer8 Winter8 All-season1
255/40 R20	+1.05 %	101.1 km/h	9" – 8,5" – 9,5" – 10"	33 models in stockFrom CHF 87.90 Summer11 Winter12 All-season10
295/35 R20	+1.41 %	101.4 km/h	10,5" – 10" – 11" – 11,5"	16 models in stockFrom CHF 180.00 Summer9 Winter7

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
265/30 R21	-1.73 %	98.3 km/h	9,5" – 9" – 10"	—
295/30 R21	+0.83 %	100.8 km/h	10,5" – 10" – 11"	8 models in stockFrom CHF 250.00 Summer2 Winter6
255/35 R21	+1.05 %	101.1 km/h	9" – 8,5" – 9,5" – 10"	14 models in stockFrom CHF 205.00 Summer1 Winter11 All-season2

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
285/25 R22	-0.47 %	99.5 km/h	10,5"	—
245/30 R22	+0.18 %	100.2 km/h	8,5" – 8" – 9"	—
255/30 R22	+1.01 %	101.0 km/h	9" – 8,5" – 9,5"	—
265/30 R22	+1.87 %	101.9 km/h	9,5" – 9" – 10"	1 model in stockFrom CHF 196.00 Summer1