285/70R17
Common fitments: Wrangler Rubicon, Power Wagon
Overall diameter
32.71″
831 mm
Sidewall height
7.85″
199.5 mm
Tread width
285 mm
11.2″
Circumference
102.76″
8.6 ft
Revs per mile
617
383 per km
Wheel diameter
17″
aspect ratio 70%
Cross-section
- Overall diameter
- 32.71″
- Sidewall (each side)
- 7.85″
- Wheel
- 17″
285/70R17 compared with other sizes
All 28 practical swaps involving 285/70R17 — diameter change, speedometer impact and a fit verdict for each.
285/70R17 → 265/70R17
265/70R17
Diameter +3.5% · Marginal fit — proceed with care
285/70R17 → 285/75R16
285/75R16
Diameter −0.4% · Good fit
285/70R17 → 245/75R17
245/75R17
Diameter +3.9% · Marginal fit — proceed with care
285/70R17 → 255/70R17
255/70R17
Diameter +5.3% · Not recommended
285/70R17 → 255/75R17
255/75R17
Diameter +2.0% · Good fit
285/70R17 → 275/70R17
275/70R17
Diameter +1.7% · Good fit
305/65R17 → 285/70R17
305/65R17
Diameter −0.3% · Good fit
275/70R17 → 285/70R17
275/70R17
Diameter −1.7% · Good fit
255/75R17 → 285/70R17
255/75R17
Diameter −2.0% · Good fit
305/70R17 → 285/70R17
305/70R17
Diameter +3.4% · Marginal fit — proceed with care
265/70R17 → 285/70R17
265/70R17
Diameter −3.4% · Marginal fit — proceed with care
245/75R17 → 285/70R17
245/75R17
Diameter −3.8% · Marginal fit — proceed with care
285/75R16 → 285/70R17
285/75R16
Diameter +0.4% · Good fit
285/65R18 → 285/70R17
285/65R18
Diameter −0.4% · Good fit
275/65R17 → 285/70R17
275/65R17
Diameter −5.0% · Marginal fit — proceed with care
255/70R17 → 285/70R17
255/70R17
Diameter −5.1% · Not recommended
315/70R17 → 285/70R17
315/70R17
Diameter +5.1% · Not recommended
265/70R18 → 285/70R17
265/70R18
Diameter −0.3% · Good fit
305/60R18 → 285/70R17
305/60R18
Diameter −0.9% · Good fit
275/70R18 → 285/70R17
275/70R18
Diameter +1.4% · Good fit
285/70R17 → 305/65R17
305/65R17
Diameter +0.3% · Good fit
285/70R17 → 305/70R17
305/70R17
Diameter −3.3% · Marginal fit — proceed with care
285/70R17 → 315/70R17
315/70R17
Diameter −4.8% · Marginal fit — proceed with care
285/70R17 → 265/70R18
265/70R18
Diameter +0.3% · Good fit
285/70R17 → 275/70R18
275/70R18
Diameter −1.4% · Good fit
285/70R17 → 285/65R18
285/65R18
Diameter +0.4% · Good fit
285/70R17 → 305/60R18
305/60R18
Diameter +0.9% · Good fit
285/70R17 → 225/45R17
225/45R17
Diameter +31.0% · Not recommended
Common questions
- What is the overall diameter of a 285/70R17 tire?
- A 285/70R17 tire is about 32.71″ (831 mm) in overall diameter, with a sidewall height of 199.5 mm and a circumference of 102.76″.
- How many revolutions per mile does a 285/70R17 tire turn?
- A 285/70R17 turns roughly 617 revolutions per mile (383 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 285/70R17 mean?
- 285 is the tread width in millimetres, 70 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 285 × 70% = 199.5 mm tall.