325/60R18 tire size
325/60R18 is a metric size: 33.4" tall, 12.8" wide, on a 18" rim — about a 33.5x13.00R18. The sidewall is 7.7" and the tire turns 605 times per mile.
325/60R18 specs
| Overall diameter (height) | 33.35" · 847 mm |
|---|---|
| Section width | 12.80" · 325 mm |
| Sidewall height | 7.68" · 195 mm (60% of width) |
| Rim diameter | 18" |
| Circumference | 104.79" · 2.662 m |
| Revolutions per mile | 605 (376 per km) |
| Inch (flotation) equivalent | 33.5x13.00R18 |
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 | |
|---|---|---|---|---|---|
| 275/65R18 common | 32.07" | -3.84% | -50 mm | 57.7 mph | compare → |
| 275/70R18 common | 33.16" | -0.59% | -50 mm | 59.6 mph | compare → |
| 265/70R18 common | 32.61" | -2.24% | -60 mm | 58.7 mph | compare → |
| 255/70R18 common | 32.06" | -3.90% | -70 mm | 57.7 mph | compare → |
| 35x12.50R18 common | 35.00" | +4.93% | -7 mm | 63.0 mph | compare → |
| 285/65R18 common | 32.59" | -2.30% | -40 mm | 58.6 mph | compare → |
| 295/70R18 common | 34.26" | +2.71% | -30 mm | 61.6 mph | compare → |
| 33x12.50R18 | 33.00" | -1.06% | -7 mm | 59.4 mph | compare → |
| 285/75R18 | 34.83" | +4.43% | -40 mm | 62.7 mph | compare → |
| 325/65R18 | 34.63" | +3.84% | 0 mm | 62.3 mph | compare → |
| 305/70R18 | 34.81" | +4.37% | -20 mm | 62.6 mph | compare → |
| 305/65R18 | 33.61" | +0.77% | -20 mm | 60.5 mph | compare → |
| 285/70R18 | 33.71" | +1.06% | -40 mm | 60.6 mph | compare → |
| 305/60R18 | 32.41" | -2.83% | -20 mm | 58.3 mph | compare → |
| 245/75R18 | 32.47" | -2.66% | -80 mm | 58.4 mph | calculate → |
| 295/65R18 | 33.10" | -0.77% | -30 mm | 59.5 mph | calculate → |
| 35x11.50R18 | 35.00" | +4.93% | -33 mm | 63.0 mph | calculate → |
| 33x11.50R18 | 33.00" | -1.06% | -33 mm | 59.4 mph | calculate → |
| 33x13.50R18 | 33.00" | -1.06% | +18 mm | 59.4 mph | calculate → |
| 33x13.00R18 | 33.00" | -1.06% | +5 mm | 59.4 mph | calculate → |
| 235/80R18 | 32.80" | -1.65% | -90 mm | 59.0 mph | calculate → |
| 34x12.50R18 | 34.00" | +1.94% | -7 mm | 61.2 mph | calculate → |
| 35x13.00R18 | 35.00" | +4.93% | +5 mm | 63.0 mph | calculate → |
| 35x14.50R18 | 35.00" | +4.93% | +43 mm | 63.0 mph | calculate → |
| 33x10.50R18 | 33.00" | -1.06% | -58 mm | 59.4 mph | calculate → |
| 35x13.50R18 | 35.00" | +4.93% | +18 mm | 63.0 mph | calculate → |
Plus / minus sizing: 17" and 19" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
Try another size against 325/60R18
Questions
What size is 325/60R18 in inches?
325/60R18 is about 33.4" tall and 12.8" wide on a 18-inch rim — roughly a 33.5x13.00R18 in inch sizing.
What does 325/60R18 mean?
325 mm section width, sidewall 60% of the width (7.68"), radial construction, 18-inch rim.
What tire sizes are equivalent to 325/60R18?
On the same 18" rim, within 3% of the diameter: 275/70R18 (-0.59%), 305/65R18 (+0.77%), 295/65R18 (-0.77%), 285/70R18 (+1.06%), 33x10.50R18 (-1.06%), 33x11.50R18 (-1.06%).
How many revolutions per mile does a 325/60R18 tire make?
About 605 revolutions per mile (circumference 104.8").
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.