245/60R18 tire size
245/60R18 is a metric size: 29.6" tall, 9.6" wide, on a 18" rim — about a 29.5x9.50R18. The sidewall is 5.8" and the tire turns 682 times per mile.
245/60R18 specs
| Overall diameter (height) | 29.57" · 751 mm |
|---|---|
| Section width | 9.65" · 245 mm |
| Sidewall height | 5.79" · 147 mm (60% of width) |
| Rim diameter | 18" |
| Circumference | 92.91" · 2.360 m |
| Revolutions per mile | 682 (424 per km) |
| Inch (flotation) equivalent | 29.5x9.50R18 |
Equivalent sizes on a 18" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/60R18 common | 29.10" | -1.60% | -10 mm | 59.0 mph | compare → |
| 235/55R18 common | 28.18" | -4.73% | -10 mm | 57.2 mph | compare → |
| 265/60R18 common | 30.52" | +3.19% | +20 mm | 61.9 mph | compare → |
| 225/60R18 common | 28.63" | -3.19% | -20 mm | 58.1 mph | compare → |
| 255/55R18 common | 29.04" | -1.80% | +10 mm | 58.9 mph | compare → |
| 235/65R18 common | 30.03" | +1.53% | -10 mm | 60.9 mph | compare → |
| 255/65R18 common | 31.05" | +4.99% | +10 mm | 63.0 mph | compare → |
| 255/60R18 | 30.05" | +1.60% | +10 mm | 61.0 mph | compare → |
| 245/55R18 | 28.61" | -3.26% | 0 mm | 58.0 mph | compare → |
| 275/60R18 | 30.99" | +4.79% | +30 mm | 62.9 mph | compare → |
| 295/45R18 | 28.45" | -3.79% | +50 mm | 57.7 mph | calculate → |
| 155/90R18 | 28.98" | -2.00% | -90 mm | 58.8 mph | calculate → |
| 165/90R18 | 29.69" | +0.40% | -80 mm | 60.2 mph | calculate → |
| 285/50R18 | 29.22" | -1.20% | +40 mm | 59.3 mph | calculate → |
| 305/45R18 | 28.81" | -2.60% | +60 mm | 58.4 mph | calculate → |
| 155/85R18 | 28.37" | -4.06% | -90 mm | 57.6 mph | calculate → |
| 215/60R18 | 28.16" | -4.79% | -30 mm | 57.1 mph | calculate → |
| 325/45R18 | 29.52" | -0.20% | +80 mm | 59.9 mph | calculate → |
| 275/55R18 | 29.91" | +1.13% | +30 mm | 60.7 mph | calculate → |
| 285/55R18 | 30.34" | +2.60% | +40 mm | 61.6 mph | calculate → |
| 175/90R18 | 30.40" | +2.80% | -70 mm | 61.7 mph | calculate → |
| 245/65R18 | 30.54" | +3.26% | 0 mm | 62.0 mph | calculate → |
| 235/70R18 | 30.95" | +4.66% | -10 mm | 62.8 mph | calculate → |
| 285/45R18 | 28.10" | -4.99% | +40 mm | 57.0 mph | calculate → |
| 225/65R18 | 29.52" | -0.20% | -20 mm | 59.9 mph | calculate → |
| 265/55R18 | 29.48" | -0.33% | +20 mm | 59.8 mph | calculate → |
| 265/50R18 | 28.43" | -3.86% | +20 mm | 57.7 mph | calculate → |
Plus / minus sizing: 17" and 19" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 245/65R17 common | 29.54" | -0.12% | 0 mm | 59.9 mph | compare → |
| 245/55R19 common | 29.61" | +0.12% | 0 mm | 60.1 mph | compare → |
| 265/50R19 common | 29.43" | -0.48% | +20 mm | 59.7 mph | compare → |
| 275/50R19 | 29.83" | +0.85% | +30 mm | 60.5 mph | compare → |
| 265/60R17 | 29.52" | -0.19% | +20 mm | 59.9 mph | calculate → |
| 295/45R19 | 29.45" | -0.41% | +50 mm | 59.8 mph | calculate → |
| 175/90R17 | 29.40" | -0.59% | -70 mm | 59.6 mph | calculate → |
| 225/70R17 | 29.40" | -0.59% | -20 mm | 59.6 mph | calculate → |
Try another size against 245/60R18
Questions
What size is 245/60R18 in inches?
245/60R18 is about 29.6" tall and 9.6" wide on a 18-inch rim — roughly a 29.5x9.50R18 in inch sizing.
What does 245/60R18 mean?
245 mm section width, sidewall 60% of the width (5.79"), radial construction, 18-inch rim.
What tire sizes are equivalent to 245/60R18?
On the same 18" rim, within 3% of the diameter: 225/65R18 (-0.20%), 325/45R18 (-0.20%), 265/55R18 (-0.33%), 165/90R18 (+0.40%), 275/55R18 (+1.13%), 285/50R18 (-1.20%).
How many revolutions per mile does a 245/60R18 tire make?
About 682 revolutions per mile (circumference 92.9").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.