335/30R18 tire size
335/30R18 is a metric size: 25.9" tall, 13.2" wide, on a 18" rim — about a 26x13.00R18. The sidewall is 4.0" and the tire turns 778 times per mile.
335/30R18 specs
| Overall diameter (height) | 25.91" · 658 mm |
|---|---|
| Section width | 13.19" · 335 mm |
| Sidewall height | 3.96" · 101 mm (30% of width) |
| Rim diameter | 18" |
| Circumference | 81.41" · 2.068 m |
| Revolutions per mile | 778 (484 per km) |
| Inch (flotation) equivalent | 26x13.00R18 |
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 | |
|---|---|---|---|---|---|
| 225/45R18 common | 25.97" | +0.23% | -110 mm | 60.1 mph | compare → |
| 245/40R18 common | 25.72" | -0.76% | -90 mm | 59.5 mph | compare → |
| 225/40R18 common | 25.09" | -3.19% | -110 mm | 58.1 mph | compare → |
| 245/45R18 common | 26.68" | +2.96% | -90 mm | 61.8 mph | compare → |
| 235/45R18 common | 26.33" | +1.60% | -100 mm | 61.0 mph | compare → |
| 235/40R18 common | 25.40" | -1.98% | -100 mm | 58.8 mph | compare → |
| 225/50R18 common | 26.86" | +3.65% | -110 mm | 62.2 mph | compare → |
| 255/35R18 common | 25.03" | -3.42% | -80 mm | 57.9 mph | compare → |
| 255/40R18 common | 26.03" | +0.46% | -80 mm | 60.3 mph | compare → |
| 275/35R18 common | 25.58" | -1.29% | -60 mm | 59.2 mph | compare → |
| 265/35R18 common | 25.30" | -2.35% | -70 mm | 58.6 mph | compare → |
| 255/45R18 common | 27.04" | +4.33% | -80 mm | 62.6 mph | compare → |
| 275/40R18 common | 26.66" | +2.89% | -60 mm | 61.7 mph | compare → |
| 215/45R18 common | 25.62" | -1.14% | -120 mm | 59.3 mph | compare → |
| 245/35R18 common | 24.75" | -4.48% | -90 mm | 57.3 mph | compare → |
| 215/40R18 | 24.77" | -4.41% | -120 mm | 57.4 mph | compare → |
| 285/35R18 | 25.85" | -0.23% | -50 mm | 59.9 mph | compare → |
| 265/40R18 | 26.35" | +1.67% | -70 mm | 61.0 mph | compare → |
| 295/30R18 | 24.97" | -3.65% | -40 mm | 57.8 mph | compare → |
| 315/30R18 | 25.44" | -1.82% | -20 mm | 58.9 mph | compare → |
| 285/30R18 | 24.73" | -4.56% | -50 mm | 57.3 mph | compare → |
| 295/35R18 | 26.13" | +0.84% | -40 mm | 60.5 mph | compare → |
| 215/50R18 | 26.46" | +2.13% | -120 mm | 61.3 mph | compare → |
| 285/40R18 | 26.98" | +4.10% | -50 mm | 62.5 mph | calculate → |
| 305/35R18 | 26.41" | +1.90% | -30 mm | 61.1 mph | calculate → |
| 145/70R18 | 25.99" | +0.30% | -190 mm | 60.2 mph | calculate → |
| 26x12.00R18 | 26.00" | +0.33% | -30 mm | 60.2 mph | calculate → |
| 26x6.00R18 | 26.00" | +0.33% | -183 mm | 60.2 mph | calculate → |
| 26x8.00R18 | 26.00" | +0.33% | -132 mm | 60.2 mph | calculate → |
| 155/60R18 | 25.32" | -2.28% | -180 mm | 58.6 mph | calculate → |
| 155/70R18 | 26.54" | +2.43% | -180 mm | 61.5 mph | calculate → |
| 305/30R18 | 25.20" | -2.73% | -30 mm | 58.4 mph | calculate → |
| 325/35R18 | 26.96" | +4.03% | -10 mm | 62.4 mph | calculate → |
| 165/70R18 | 27.09" | +4.56% | -170 mm | 62.7 mph | calculate → |
| 145/80R18 | 27.13" | +4.71% | -190 mm | 62.8 mph | calculate → |
| 345/30R18 | 26.15" | +0.91% | +10 mm | 60.5 mph | calculate → |
| 205/45R18 | 25.26" | -2.51% | -130 mm | 58.5 mph | calculate → |
| 315/35R18 | 26.68" | +2.96% | -20 mm | 61.8 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 | |
|---|---|---|---|---|---|
| 225/50R17 common | 25.86" | -0.21% | -110 mm | 59.9 mph | compare → |
| 245/45R17 common | 25.68" | -0.90% | -90 mm | 59.5 mph | compare → |
| 255/35R19 common | 26.03" | +0.44% | -80 mm | 60.3 mph | compare → |
| 245/35R19 common | 25.75" | -0.62% | -90 mm | 59.6 mph | compare → |
| 225/40R19 common | 26.09" | +0.67% | -110 mm | 60.4 mph | compare → |
| 285/30R19 | 25.73" | -0.70% | -50 mm | 59.6 mph | compare → |
| 205/55R17 | 25.88" | -0.14% | -130 mm | 59.9 mph | compare → |
| 275/40R17 | 25.66" | -0.97% | -60 mm | 59.4 mph | compare → |
| 295/30R19 | 25.97" | +0.21% | -40 mm | 60.1 mph | compare → |
| 255/45R17 | 26.04" | +0.47% | -80 mm | 60.3 mph | compare → |
| 315/35R17 | 25.68" | -0.90% | -20 mm | 59.5 mph | compare → |
| 285/40R17 | 25.98" | +0.24% | -50 mm | 60.1 mph | calculate → |
| 175/65R17 | 25.96" | +0.17% | -160 mm | 60.1 mph | calculate → |
| 145/80R17 | 26.13" | +0.85% | -190 mm | 60.5 mph | calculate → |
| 26x6.00R17 | 26.00" | +0.33% | -183 mm | 60.2 mph | calculate → |
| 185/60R17 | 25.74" | -0.67% | -150 mm | 59.6 mph | calculate → |
| 165/70R17 | 26.09" | +0.70% | -170 mm | 60.4 mph | calculate → |
Try another size against 335/30R18
Questions
What size is 335/30R18 in inches?
335/30R18 is about 25.9" tall and 13.2" wide on a 18-inch rim — roughly a 26x13.00R18 in inch sizing.
What does 335/30R18 mean?
335 mm section width, sidewall 30% of the width (3.96"), radial construction, 18-inch rim.
What tire sizes are equivalent to 335/30R18?
On the same 18" rim, within 3% of the diameter: 285/35R18 (-0.23%), 225/45R18 (+0.23%), 145/70R18 (+0.30%), 26x12.00R18 (+0.33%), 26x6.00R18 (+0.33%), 26x8.00R18 (+0.33%).
How many revolutions per mile does a 335/30R18 tire make?
About 778 revolutions per mile (circumference 81.4").
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.