235/80R17
Overall diameter
31.80″
808 mm
Sidewall height
7.40″
188.0 mm
Tread width
235 mm
9.3″
Circumference
99.91″
8.3 ft
Revs per mile
634
394 per km
Wheel diameter
17″
aspect ratio 80%
Cross-section
- Overall diameter
- 31.80″
- Sidewall (each side)
- 7.40″
- Wheel
- 17″
235/80R17 compared with other sizes
All 24 practical swaps involving 235/80R17 — diameter change, speedometer impact and a fit verdict for each.
235/80R17 → 265/70R17
265/70R17
Diameter +0.6% · Good fit
235/80R17 → 265/75R16
265/75R16
Diameter +0.5% · Good fit
265/70R17 → 235/80R17
265/70R17
Diameter −0.6% · Good fit
255/75R17 → 235/80R17
255/75R17
Diameter +0.8% · Good fit
245/75R17 → 235/80R17
245/75R17
Diameter −1.1% · Good fit
275/70R17 → 235/80R17
275/70R17
Diameter +1.1% · Good fit
275/65R17 → 235/80R17
275/65R17
Diameter −2.3% · Good fit
255/70R17 → 235/80R17
255/70R17
Diameter −2.4% · Good fit
265/65R17 → 235/80R17
265/65R17
Diameter −3.9% · Marginal fit — proceed with care
245/70R17 → 235/80R17
245/70R17
Diameter −4.1% · Marginal fit — proceed with care
265/75R16 → 235/80R17
265/75R16
Diameter −0.5% · Good fit
265/65R18 → 235/80R17
265/65R18
Diameter −0.8% · Good fit
255/70R18 → 235/80R17
255/70R18
Diameter +0.8% · Good fit
275/65R18 → 235/80R17
275/65R18
Diameter +0.9% · Good fit
255/65R18 → 235/80R17
255/65R18
Diameter −2.4% · Good fit
255/60R19 → 235/80R17
255/60R19
Diameter −2.4% · Good fit
235/80R17 → 245/70R17
245/70R17
Diameter +4.3% · Marginal fit — proceed with care
235/80R17 → 245/75R17
245/75R17
Diameter +1.1% · Good fit
235/80R17 → 255/70R17
255/70R17
Diameter +2.4% · Good fit
235/80R17 → 255/75R17
255/75R17
Diameter −0.8% · Good fit
235/80R17 → 265/65R17
265/65R17
Diameter +4.1% · Marginal fit — proceed with care
235/80R17 → 275/65R17
275/65R17
Diameter +2.3% · Good fit
235/80R17 → 275/70R17
275/70R17
Diameter −1.1% · Good fit
235/80R17 → 225/45R17
225/45R17
Diameter +27.4% · Not recommended
Common questions
- What is the overall diameter of a 235/80R17 tire?
- A 235/80R17 tire is about 31.80″ (808 mm) in overall diameter, with a sidewall height of 188.0 mm and a circumference of 99.91″.
- How many revolutions per mile does a 235/80R17 tire turn?
- A 235/80R17 turns roughly 634 revolutions per mile (394 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 235/80R17 mean?
- 235 is the tread width in millimetres, 80 is the aspect ratio — the sidewall height as a percentage of the tread width — and 17 is the wheel diameter in inches. So the sidewall is 235 × 80% = 188.0 mm tall.