245/60R18
A 245/60R18 tire is 29.57 inches tall and 9.6 inches wide, with a 5.79-inch sidewall, mounted on a 18-inch wheel.
Common fitments: Grand Cherokee, Explorer
Overall diameter
29.57″
751 mm
Sidewall height
5.79″
147.0 mm
Tread width
245 mm
9.6″
Circumference
92.91″
7.7 ft
Revs per mile
682
424 per km
Wheel diameter
18″
aspect ratio 60%
Cross-section
- Overall diameter
- 29.57″
- Sidewall (each side)
- 5.79″
- Wheel
- 18″
245/60R18 in inches and millimeters
Every dimension of a 245/60R18, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 29.57″ | 751 mm |
| Tread width | 9.6″ | 245 mm |
| Sidewall height | 5.79″ | 147.0 mm |
| Wheel diameter | 18″ | 457 mm |
| Circumference | 92.91″ | 2360 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.
245/60R18 compared with other sizes
All 34 practical swaps involving 245/60R18 — diameter change, speedometer impact and a fit verdict for each.
245/60R18 → 235/60R18
235/60R18
Diameter +1.6% · This fits
245/60R18 → 255/55R18
255/55R18
Diameter +1.8% · This fits
245/60R18 → 265/60R18
265/60R18
Diameter −3.1% · Borderline. Check clearance first
245/60R18 → 265/50R19
265/50R19
Diameter +0.5% · This fits
245/60R18 → 275/45R20
275/45R20
Diameter −0.6% · This fits
245/60R18 → 225/75R16
225/75R16
Diameter +1.0% · This fits
245/60R18 → 245/70R16
245/70R16
Diameter +0.2% · This fits
245/60R18 → 255/70R16
255/70R16
Diameter −1.6% · This fits
245/60R18 → 245/65R17
245/65R17
Diameter +0.1% · This fits
245/60R18 → 225/60R18
225/60R18
Diameter +3.3% · Borderline. Check clearance first
245/60R18 → 235/55R18
235/55R18
Diameter +5.0% · Borderline. Check clearance first
245/60R18 → 235/65R18
235/65R18
Diameter −1.5% · This fits
235/65R18 → 245/60R18
235/65R18
Diameter +1.5% · This fits
255/60R18 → 245/60R18
255/60R18
Diameter +1.6% · This fits
235/60R18 → 245/60R18
235/60R18
Diameter −1.6% · This fits
255/55R18 → 245/60R18
255/55R18
Diameter −1.8% · This fits
245/65R18 → 245/60R18
245/65R18
Diameter +3.3% · Borderline. Check clearance first
265/60R18 → 245/60R18
265/60R18
Diameter +3.2% · Borderline. Check clearance first
225/60R18 → 245/60R18
225/60R18
Diameter −3.2% · Borderline. Check clearance first
245/55R19 → 245/60R18
245/55R19
Diameter +0.1% · This fits
245/65R17 → 245/60R18
245/65R17
Diameter −0.1% · This fits
245/70R16 → 245/60R18
245/70R16
Diameter −0.2% · This fits
245/50R20 → 245/60R18
245/50R20
Diameter +0.2% · This fits
235/55R18 → 245/60R18
235/55R18
Diameter −4.7% · Borderline. Check clearance first
275/60R18 → 245/60R18
275/60R18
Diameter +4.8% · Borderline. Check clearance first
255/65R18 → 245/60R18
255/65R18
Diameter +5.0% · Borderline. Check clearance first
245/60R18 → 245/65R18
245/65R18
Diameter −3.2% · Borderline. Check clearance first
245/60R18 → 255/60R18
255/60R18
Diameter −1.6% · This fits
245/60R18 → 255/65R18
255/65R18
Diameter −4.8% · Borderline. Check clearance first
245/60R18 → 275/60R18
275/60R18
Diameter −4.6% · Borderline. Check clearance first
245/60R18 → 245/55R19
245/55R19
Diameter −0.1% · This fits
245/60R18 → 245/50R20
245/50R20
Diameter −0.2% · This fits
245/60R18 → 265/45R20
265/45R20
Diameter +0.6% · This fits
245/60R18 → 235/45R18
235/45R18
Diameter +12.3% · Too big a jump
Common questions
- What is 245/60R18 in inches?
- A 245/60R18 tire is 29.57 inches tall and 9.6 inches wide, with a 5.79-inch sidewall, mounted on a 18-inch wheel. In metric that is 751 mm tall and 245 mm wide. The circumference is 92.91 inches.
- How tall is a 245/60R18 tire?
- 29.57 inches, or 751 mm. That is the overall diameter, wheel included. It turns about 682 times per mile, which is what your speedometer counts.
- What do the numbers in 245/60R18 mean?
- 245 is the tread width in millimeters, 60 is the aspect ratio — the sidewall height as a percentage of the tread width — and 18 is the wheel diameter in inches. So the sidewall is 245 × 60% = 147.0 mm tall.