Tyre size calculator

Equivalent sizes for the 265/40 R21 tyre

Sidewall height 106 mmDiameter 745 mm Circumference 2342 mmRevolutions/km 427

Approved rim widths according to ETRTO: 9,5" – 9" – 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
255/45 R20	-1.06 %	98.9 km/h	8,5" – 8" – 9" – 9,5"	34 models in stockFrom CHF 85.90 Summer14 Winter7 All-season13
295/40 R20	-0.20 %	99.8 km/h	10,5" – 10" – 11" – 11,5"	19 models in stockFrom CHF 164.00 Summer9 Winter10
265/45 R20	+0.14 %	100.1 km/h	9" – 8,5" – 9,5" – 10"	28 models in stockFrom CHF 95.90 Summer10 Winter10 All-season8
275/45 R20	+1.33 %	101.3 km/h	9" – 8,5" – 9,5" – 10" – 10,5"	37 models in stockFrom CHF 98.90 Summer11 Winter17 All-season9

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
285/35 R21	-1.70 %	98.3 km/h	10" – 9,5" – 10,5" – 11"	13 models in stockFrom CHF 235.00 Summer8 Winter5
255/40 R21	-1.09 %	98.9 km/h	9" – 8,5" – 9,5" – 10"	7 models in stockFrom CHF 215.00 Summer2 Winter4 All-season1
295/35 R21	-0.75 %	99.3 km/h	10,5" – 10" – 11" – 11,5"	20 models in stockFrom CHF 118.00 Summer7 Winter11 All-season2
265/40 R21 Your size	0 %	100.0 km/h	9,5" – 9" – 10" – 10,5"	20 models in stockFrom CHF 200.00 Summer9 Winter7 All-season4

Size	Difference	Actual speed at 100 km/h on the speedometer	ETRTO rims	Tyres in stock
295/30 R22	-1.29 %	98.7 km/h	10,5" – 10" – 11"	2 models in stockFrom CHF 305.00 Winter2
265/35 R22	-0.17 %	99.8 km/h	9,5" – 9" – 10" – 10,5"	5 models in stockFrom CHF 279.00 Winter5
275/35 R22	+0.78 %	100.8 km/h	9,5" – 9" – 10" – 10,5" – 11"	6 models in stockFrom CHF 218.00 Summer3 Winter3
285/35 R22	+1.70 %	101.7 km/h	10" – 9,5" – 10,5" – 11"	10 models in stockFrom CHF 241.00 Summer2 Winter6 All-season2