275/55R20
Most common 20″ sizeCommon fitments: F-150, Silverado, Yukon
Overall diameter
31.91″
810 mm
Sidewall height
5.95″
151.3 mm
Tread width
275 mm
10.8″
Circumference
100.25″
8.4 ft
Revs per mile
632
393 per km
Wheel diameter
20″
aspect ratio 55%
Cross-section
- Overall diameter
- 31.91″
- Sidewall (each side)
- 5.95″
- Wheel
- 20″
275/55R20 compared with other sizes
All 51 practical swaps involving 275/55R20 — diameter change, speedometer impact and a fit verdict for each.
305/50R20 → 275/55R20
305/50R20
Diameter +0.3% · Good fit
265/55R20 → 275/55R20
265/55R20
Diameter −1.4% · Good fit
285/55R20 → 275/55R20
285/55R20
Diameter +1.4% · Good fit
265/60R20 → 275/55R20
265/60R20
Diameter +1.9% · Good fit
275/60R20 → 275/55R20
275/60R20
Diameter +3.4% · Marginal fit — proceed with care
285/50R20 → 275/55R20
285/50R20
Diameter −2.2% · Good fit
255/55R20 → 275/55R20
255/55R20
Diameter −2.7% · Good fit
275/50R21 → 275/55R20
275/50R21
Diameter −0.3% · Good fit
305/55R20 → 275/55R20
305/55R20
Diameter +4.1% · Marginal fit — proceed with care
275/65R18 → 275/55R20
275/65R18
Diameter +0.5% · Good fit
265/50R20 → 275/55R20
265/50R20
Diameter −4.6% · Marginal fit — proceed with care
285/60R20 → 275/55R20
285/60R20
Diameter +4.9% · Marginal fit — proceed with care
255/70R18 → 275/55R20
255/70R18
Diameter +0.5% · Good fit
285/45R22 → 275/55R20
285/45R22
Diameter +0.6% · Good fit
275/55R20 → 255/70R18
255/70R18
Diameter −0.5% · Good fit
275/55R20 → 275/65R18
275/65R18
Diameter −0.5% · Good fit
275/55R20 → 255/55R20
255/55R20
Diameter +2.8% · Good fit
275/55R20 → 265/50R20
265/50R20
Diameter +4.9% · Marginal fit — proceed with care
275/55R20 → 265/55R20
265/55R20
Diameter +1.4% · Good fit
275/55R20 → 265/60R20
265/60R20
Diameter −1.9% · Good fit
275/55R20 → 275/60R20
275/60R20
Diameter −3.3% · Marginal fit — proceed with care
275/55R20 → 285/50R20
285/50R20
Diameter +2.2% · Good fit
275/55R20 → 285/55R20
285/55R20
Diameter −1.3% · Good fit
275/55R20 → 285/60R20
285/60R20
Diameter −4.6% · Marginal fit — proceed with care
275/55R20 → 305/50R20
305/50R20
Diameter −0.3% · Good fit
275/55R20 → 305/55R20
305/55R20
Diameter −3.9% · Marginal fit — proceed with care
275/55R20 → 275/50R21
275/50R21
Diameter +0.3% · Good fit
275/55R20 → 275/40R22
275/40R22
Diameter +4.1% · Marginal fit — proceed with care
275/55R20 → 275/50R22
275/50R22
Diameter −2.8% · Good fit
275/55R20 → 285/40R22
285/40R22
Diameter +3.0% · Marginal fit — proceed with care
275/55R20 → 285/45R22
285/45R22
Diameter −0.6% · Good fit
275/55R20 → 285/50R22
285/50R22
Diameter −3.9% · Marginal fit — proceed with care
275/55R20 → 305/45R22
305/45R22
Diameter −2.7% · Good fit
245/35R20 → 275/55R20
245/35R20
Diameter −16.2% · Not recommended
255/35R20 → 275/55R20
255/35R20
Diameter −15.3% · Not recommended
255/45R20 → 275/55R20
255/45R20
Diameter −9.0% · Not recommended
275/45R20 → 275/55R20
275/45R20
Diameter −6.8% · Not recommended
295/35R20 → 275/55R20
295/35R20
Diameter −11.8% · Not recommended
245/40R20 → 275/55R20
245/40R20
Diameter −13.1% · Not recommended
245/45R20 → 275/55R20
245/45R20
Diameter −10.1% · Not recommended
245/50R20 → 275/55R20
245/50R20
Diameter −7.1% · Not recommended
255/50R20 → 275/55R20
255/50R20
Diameter −5.9% · Not recommended
265/35R20 → 275/55R20
265/35R20
Diameter −14.4% · Not recommended
265/45R20 → 275/55R20
265/45R20
Diameter −7.9% · Not recommended
275/35R20 → 275/55R20
275/35R20
Diameter −13.6% · Not recommended
275/40R20 → 275/55R20
275/40R20
Diameter −10.2% · Not recommended
275/65R20 → 275/55R20
275/65R20
Diameter +6.8% · Not recommended
285/65R20 → 275/55R20
285/65R20
Diameter +8.4% · Not recommended
295/60R20 → 275/55R20
295/60R20
Diameter +6.4% · Not recommended
295/65R20 → 275/55R20
295/65R20
Diameter +10.0% · Not recommended
275/55R20 → 265/60R18
265/60R18
Diameter +4.6% · Marginal fit — proceed with care
Common questions
- What is the overall diameter of a 275/55R20 tire?
- A 275/55R20 tire is about 31.91″ (810 mm) in overall diameter, with a sidewall height of 151.3 mm and a circumference of 100.25″.
- How many revolutions per mile does a 275/55R20 tire turn?
- A 275/55R20 turns roughly 632 revolutions per mile (393 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 275/55R20 mean?
- 275 is the tread width in millimetres, 55 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 275 × 55% = 151.3 mm tall.