245/35R20
Common fitments: Civic Type R, RS 5
Overall diameter
26.75″
680 mm
Sidewall height
3.38″
85.8 mm
Tread width
245 mm
9.6″
Circumference
84.04″
7.0 ft
Revs per mile
754
468 per km
Wheel diameter
20″
aspect ratio 35%
Cross-section
- Overall diameter
- 26.75″
- Sidewall (each side)
- 3.38″
- Wheel
- 20″
245/35R20 compared with other sizes
All 22 practical swaps involving 245/35R20 — diameter change, speedometer impact and a fit verdict for each.
245/35R20 → 245/45R18
245/45R18
Diameter +0.3% · Good fit
245/35R20 → 235/40R19
235/40R19
Diameter +1.3% · Good fit
245/35R20 → 245/40R19
245/40R19
Diameter +0.1% · Good fit
255/35R20 → 245/35R20
255/35R20
Diameter +1.0% · Good fit
265/35R20 → 245/35R20
265/35R20
Diameter +2.1% · Good fit
245/40R20 → 245/35R20
245/40R20
Diameter +3.6% · Marginal fit — proceed with care
275/35R20 → 245/35R20
275/35R20
Diameter +3.1% · Marginal fit — proceed with care
245/40R19 → 245/35R20
245/40R19
Diameter −0.1% · Good fit
245/45R18 → 245/35R20
245/45R18
Diameter −0.3% · Good fit
255/40R19 → 245/35R20
255/40R19
Diameter +1.0% · Good fit
255/45R18 → 245/35R20
255/45R18
Diameter +1.1% · Good fit
235/40R19 → 245/35R20
235/40R19
Diameter −1.3% · Good fit
235/45R18 → 245/35R20
235/45R18
Diameter −1.6% · Good fit
235/50R18 → 245/35R20
235/50R18
Diameter +1.9% · Good fit
235/45R19 → 245/35R20
235/45R19
Diameter +2.1% · Good fit
245/45R19 → 245/35R20
245/45R19
Diameter +3.5% · Marginal fit — proceed with care
245/35R19 → 245/35R20
245/35R19
Diameter −3.7% · Marginal fit — proceed with care
245/35R20 → 255/35R20
255/35R20
Diameter −1.0% · Good fit
245/35R20 → 245/40R20
245/40R20
Diameter −3.5% · Marginal fit — proceed with care
245/35R20 → 265/35R20
265/35R20
Diameter −2.0% · Good fit
245/35R20 → 275/35R20
275/35R20
Diameter −3.0% · Good fit
245/35R20 → 275/55R20
275/55R20
Diameter −16.2% · Not recommended
Common questions
- What is the overall diameter of a 245/35R20 tire?
- A 245/35R20 tire is about 26.75″ (680 mm) in overall diameter, with a sidewall height of 85.8 mm and a circumference of 84.04″.
- How many revolutions per mile does a 245/35R20 tire turn?
- A 245/35R20 turns roughly 754 revolutions per mile (468 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 245/35R20 mean?
- 245 is the tread width in millimetres, 35 is the aspect ratio — the sidewall height as a percentage of the tread width — and 20 is the wheel diameter in inches. So the sidewall is 245 × 35% = 85.8 mm tall.