Tyre size calculator

Equivalent sizes for the 245/40 R17 tyre

Sidewall height 98 mmDiameter 628 mm Circumference 1972 mmRevolutions/km 507

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

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
225/50 R16	+0.57 %	100.6 km/h	7" – 6" – 6,5" – 7,5" – 8"	9 models in stockFrom CHF 104.00 Summer5 Winter2 All-season2

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
235/40 R17	-1.29 %	98.7 km/h	8,5" – 8" – 9" – 9,5"	—
215/45 R17	-0.40 %	99.6 km/h	7" – 7,5" – 8"	34 models in stockFrom CHF 65.90 Summer9 Winter11 All-season14
245/40 R17 Your size	0 %	100.0 km/h	8,5" – 8" – 9" – 9,5"	9 models in stockFrom CHF 102.00 Summer7 Winter2
225/45 R17	+1.01 %	101.0 km/h	7,5" – 7" – 8" – 8,5"	74 models in stockFrom CHF 66.90 Summer27 Winter26 All-season21
255/40 R17	+1.25 %	101.3 km/h	9" – 8,5" – 9,5" – 10"	—

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
245/35 R18	+0.12 %	100.1 km/h	8,5" – 8" – 9" – 9,5"	16 models in stockFrom CHF 108.00 Summer7 Winter2 All-season7
215/40 R18	+0.20 %	100.2 km/h	7,5" – 7" – 8" – 8,5"	25 models in stockFrom CHF 65.90 Summer11 Winter6 All-season8
255/35 R18	+1.25 %	101.3 km/h	9" – 8,5" – 9,5" – 10"	21 models in stockFrom CHF 112.00 Summer9 Winter5 All-season7
225/40 R18	+1.50 %	101.5 km/h	8" – 7,5" – 8,5" – 9"	45 models in stockFrom CHF 69.90 Summer6 Winter22 All-season17

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
245/30 R19	+0.28 %	100.3 km/h	8,5" – 8" – 9"	1 model in stockFrom CHF 248.00 Summer1
215/35 R19	+0.85 %	100.9 km/h	7,5" – 7" – 8" – 8,5"	—
255/30 R19	+1.21 %	101.2 km/h	9" – 8,5" – 9,5"	11 models in stockFrom CHF 148.00 Summer11
225/35 R19	+1.94 %	101.9 km/h	8" – 7,5" – 8,5" – 9"	18 models in stockFrom CHF 74.90 Summer10 Winter2 All-season6