Tyre size calculator

245
30
21

Equivalent sizes for the 245/30 R21 tyre

Sidewall height 74 mmDiameter 680 mm Circumference 2138 mmRevolutions/km 468

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

Tyre size equivalents

20″

Size Difference Actual speed at 100 km/h on the speedometer ETRTO rims Tyres in stock
265/30 R20 -1.98 % 98.0 km/h 9,5" – 9" – 10"
UniroyalContinentalVredestein 7 models in stockFrom CHF 205.00 Summer2 Winter5
235/35 R20 -1.16 % 98.8 km/h 8,5" – 8" – 9" – 9,5"
FirestoneNexenGoodyear 15 models in stockFrom CHF 172.00 Summer5 Winter9 All-season1
275/30 R20 -1.08 % 98.9 km/h 9,5" – 9" – 10"
HankookNexenContinental 18 models in stockFrom CHF 174.00 Summer9 Winter6 All-season3
245/35 R20 -0.15 % 99.9 km/h 8,5" – 8" – 9" – 9,5"
TracmaxHankookLandspider 31 models in stockFrom CHF 81.90 Summer14 Winter9 All-season8
255/35 R20 +0.90 % 100.9 km/h 9" – 8,5" – 9,5" – 10"
TracmaxPirelliVredestein 27 models in stockFrom CHF 81.90 Summer11 Winter9 All-season7
265/35 R20 +1.90 % 101.9 km/h 9,5" – 9" – 10" – 10,5"
PirelliKumhoNexen 18 models in stockFrom CHF 177.00 Summer11 Winter7

21″

Size Difference Actual speed at 100 km/h on the speedometer ETRTO rims Tyres in stock
245/30 R21 Your size 0 % 100.0 km/h 8,5" – 8" – 9" —
255/30 R21 +0.86 % 100.9 km/h 9" – 8,5" – 9,5"
Goodyear 1 model in stockFrom CHF 327.00 Summer1
265/30 R21 +1.75 % 101.8 km/h 9,5" – 9" – 10" —

Sizes equivalent to 245/30 R21:

265/30 R20235/35 R20275/30 R20245/35 R20255/35 R20265/35 R20255/30 R21265/30 R21

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This information is provided for guidance only and does not engage Rupteur's liability in any way.