305/65R17
A 305/65R17 tire is 32.61 inches tall and 12.0 inches wide, with a 7.81-inch sidewall, mounted on a 17-inch wheel.
Overall diameter
32.61″
828 mm
Sidewall height
7.81″
198.3 mm
Tread width
305 mm
12.0″
Circumference
102.45″
8.5 ft
Revs per mile
618
384 per km
Wheel diameter
17″
aspect ratio 65%
Cross-section
- Overall diameter
- 32.61″
- Sidewall (each side)
- 7.81″
- Wheel
- 17″
305/65R17 in inches and millimeters
Every dimension of a 305/65R17, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 32.61″ | 828 mm |
| Tread width | 12.0″ | 305 mm |
| Sidewall height | 7.81″ | 198.3 mm |
| Wheel diameter | 17″ | 432 mm |
| Circumference | 102.45″ | 2602 mm |
Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.
305/65R17 compared with other sizes
All 25 practical swaps involving 305/65R17 — diameter change, speedometer impact and a fit verdict for each.
305/65R17 → 265/70R17
265/70R17
Diameter +3.2% · Borderline. Check clearance first
305/65R17 → 285/75R16
285/75R16
Diameter −0.7% · This fits
305/65R17 → 275/65R17
275/65R17
Diameter +4.9% · Borderline. Check clearance first
305/65R17 → 275/70R17
275/70R17
Diameter +1.4% · This fits
305/65R17 → 285/70R17
285/70R17
Diameter −0.3% · This fits
285/70R17 → 305/65R17
285/70R17
Diameter +0.3% · This fits
275/70R17 → 305/65R17
275/70R17
Diameter −1.4% · This fits
305/70R17 → 305/65R17
305/70R17
Diameter +3.7% · Borderline. Check clearance first
265/70R17 → 305/65R17
265/70R17
Diameter −3.1% · Borderline. Check clearance first
305/60R18 → 305/65R17
305/60R18
Diameter −0.6% · This fits
275/65R17 → 305/65R17
275/65R17
Diameter −4.7% · Borderline. Check clearance first
265/70R18 → 305/65R17
265/70R18
Diameter −0.0% · This fits
285/65R18 → 305/65R17
285/65R18
Diameter −0.1% · This fits
315/70R17 → 305/65R17
315/70R17
Diameter +5.4% · Too big a jump
285/75R16 → 305/65R17
285/75R16
Diameter +0.7% · This fits
275/65R18 → 305/65R17
275/65R18
Diameter −1.6% · This fits
275/70R18 → 305/65R17
275/70R18
Diameter +1.7% · This fits
265/75R16 → 305/65R17
265/75R16
Diameter −2.9% · This fits
265/65R18 → 305/65R17
265/65R18
Diameter −3.2% · Borderline. Check clearance first
305/65R17 → 305/70R17
305/70R17
Diameter −3.6% · Borderline. Check clearance first
305/65R17 → 315/70R17
315/70R17
Diameter −5.1% · Too big a jump
305/65R17 → 265/70R18
265/70R18
Diameter +0.0% · This fits
305/65R17 → 285/65R18
285/65R18
Diameter +0.1% · This fits
305/65R17 → 305/60R18
305/60R18
Diameter +0.6% · This fits
305/65R17 → 225/45R17
225/45R17
Diameter +30.6% · Too big a jump
Common questions
- What is 305/65R17 in inches?
- A 305/65R17 tire is 32.61 inches tall and 12.0 inches wide, with a 7.81-inch sidewall, mounted on a 17-inch wheel. In metric that is 828 mm tall and 305 mm wide. The circumference is 102.45 inches.
- How tall is a 305/65R17 tire?
- 32.61 inches, or 828 mm. That is the overall diameter, wheel included. It turns about 618 times per mile, which is what your speedometer counts.
- What do the numbers in 305/65R17 mean?
- 305 is the tread width in millimeters, 65 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 305 × 65% = 198.3 mm tall.