Tyre size calculator

Equivalent sizes for the 205/45 R17 tyre

Sidewall height 92 mmDiameter 616 mm Circumference 1936 mmRevolutions/km 516

Approved rim widths according to ETRTO: 7" – 6,5" – 7,5"

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
225/45 R16	-1.20 %	98.8 km/h	7,5" – 7" – 8" – 8,5"	—
185/55 R16	-1.03 %	99.0 km/h	—	21 models in stockFrom CHF 56.90 Summer9 Winter4 All-season8
205/50 R16	-0.78 %	99.2 km/h	6,5" – 5,5" – 6" – 7" – 7,5"	25 models in stockFrom CHF 59.90 Summer13 Winter5 All-season7
175/60 R16	+0.04 %	100.0 km/h	—	7 models in stockFrom CHF 56.90 Summer1 Winter2 All-season4
195/55 R16	+0.74 %	100.7 km/h	—	56 models in stockFrom CHF 57.90 Summer20 Winter19 All-season17
185/60 R16	+1.98 %	102.0 km/h	—	7 models in stockFrom CHF 57.90 Winter7

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
215/40 R17	-2.02 %	98.0 km/h	7,5" – 7" – 8" – 8,5"	35 models in stockFrom CHF 60.90 Summer15 Winter7 All-season13
195/45 R17	-1.44 %	98.6 km/h	6,5" – 6" – 7" – 7,5"	2 models in stockFrom CHF 112.00 Winter2
205/45 R17 Your size	0 %	100.0 km/h	7" – 6,5" – 7,5"	40 models in stockFrom CHF 63.90 Summer9 Winter15 All-season16
235/40 R17	+0.58 %	100.6 km/h	8,5" – 8" – 9" – 9,5"	—
175/55 R17	+1.32 %	101.3 km/h	—	—
215/45 R17	+1.48 %	101.5 km/h	7" – 7,5" – 8"	33 models in stockFrom CHF 65.90 Summer9 Winter10 All-season14

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
215/35 R18	-1.36 %	98.6 km/h	7,5" – 7" – 8" – 8,5"	2 models in stockFrom CHF 114.00 Summer2
225/35 R18	-0.25 %	99.8 km/h	8" – 7,5" – 8,5" – 9"	8 models in stockFrom CHF 111.00 Summer7 Winter1
205/40 R18	+0.82 %	100.8 km/h	7,5" – 7" – 8"	18 models in stockFrom CHF 111.00 Summer9 Winter6 All-season3