Tyre size calculator

Equivalent sizes for the 225/35 R20 tyre

Sidewall height 79 mmDiameter 666 mm Circumference 2091 mmRevolutions/km 478

Approved rim widths according to ETRTO: 8" – 7,5" – 8,5" – 9"

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
245/35 R19	-1.72 %	98.3 km/h	8,5" – 8" – 9" – 9,5"	36 models in stockFrom CHF 72.90 Summer12 Winter12 All-season12
255/35 R19	-0.65 %	99.4 km/h	9" – 8,5" – 9,5" – 10"	42 models in stockFrom CHF 81.90 Summer10 Winter16 All-season16
225/40 R19	-0.42 %	99.6 km/h	8" – 7,5" – 8,5" – 9"	38 models in stockFrom CHF 76.90 Summer16 Winter15 All-season7
235/40 R19	+0.76 %	100.8 km/h	8,5" – 8" – 9" – 9,5"	42 models in stockFrom CHF 76.90 Summer12 Winter17 All-season13
245/40 R19	+1.98 %	102.0 km/h	8,5" – 8" – 9" – 9,5"	45 models in stockFrom CHF 81.90 Summer16 Winter17 All-season12

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
245/30 R20	-1.56 %	98.4 km/h	8,5" – 8" – 9"	9 models in stockFrom CHF 76.90 Summer6 Winter3
255/30 R20	-0.69 %	99.3 km/h	9" – 8,5" – 9,5"	10 models in stockFrom CHF 78.90 Summer8 Winter2
225/35 R20 Your size	0 %	100.0 km/h	8" – 7,5" – 8,5" – 9"	6 models in stockFrom CHF 159.00 Summer5 Winter1
235/35 R20	+1.07 %	101.1 km/h	8,5" – 8" – 9" – 9,5"	15 models in stockFrom CHF 172.00 Summer5 Winter9 All-season1