285/35R18 tire size
285/35R18 is a metric size: 25.9" tall, 11.2" wide, on a 18" rim — about a 26x11.00R18. The sidewall is 3.9" and the tire turns 780 times per mile.
285/35R18 specs
| Overall diameter (height) | 25.85" · 657 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 3.93" · 100 mm (35% of width) |
| Rim diameter | 18" |
| Circumference | 81.22" · 2.063 m |
| Revolutions per mile | 780 (485 per km) |
| Inch (flotation) equivalent | 26x11.00R18 |
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" | +0.46% | -60 mm | 60.3 mph | compare → |
| 245/40R18 common | 25.72" | -0.53% | -40 mm | 59.7 mph | compare → |
| 225/40R18 common | 25.09" | -2.97% | -60 mm | 58.2 mph | compare → |
| 245/45R18 common | 26.68" | +3.20% | -40 mm | 61.9 mph | compare → |
| 235/45R18 common | 26.33" | +1.83% | -50 mm | 61.1 mph | compare → |
| 235/40R18 common | 25.40" | -1.75% | -50 mm | 58.9 mph | compare → |
| 225/50R18 common | 26.86" | +3.88% | -60 mm | 62.3 mph | compare → |
| 255/35R18 common | 25.03" | -3.20% | -30 mm | 58.1 mph | compare → |
| 255/40R18 common | 26.03" | +0.69% | -30 mm | 60.4 mph | compare → |
| 275/35R18 common | 25.58" | -1.07% | -10 mm | 59.4 mph | compare → |
| 265/35R18 common | 25.30" | -2.13% | -20 mm | 58.7 mph | compare → |
| 255/45R18 common | 27.04" | +4.57% | -30 mm | 62.7 mph | compare → |
| 275/40R18 common | 26.66" | +3.12% | -10 mm | 61.9 mph | compare → |
| 215/45R18 common | 25.62" | -0.91% | -70 mm | 59.5 mph | compare → |
| 245/35R18 common | 24.75" | -4.26% | -40 mm | 57.4 mph | compare → |
| 215/40R18 | 24.77" | -4.19% | -70 mm | 57.5 mph | compare → |
| 265/40R18 | 26.35" | +1.90% | -20 mm | 61.1 mph | compare → |
| 295/30R18 | 24.97" | -3.43% | +10 mm | 57.9 mph | compare → |
| 315/30R18 | 25.44" | -1.60% | +30 mm | 59.0 mph | compare → |
| 285/30R18 | 24.73" | -4.34% | 0 mm | 57.4 mph | compare → |
| 295/35R18 | 26.13" | +1.07% | +10 mm | 60.6 mph | compare → |
| 335/30R18 | 25.91" | +0.23% | +50 mm | 60.1 mph | compare → |
| 215/50R18 | 26.46" | +2.36% | -70 mm | 61.4 mph | compare → |
| 285/40R18 | 26.98" | +4.34% | 0 mm | 62.6 mph | calculate → |
| 305/35R18 | 26.41" | +2.13% | +20 mm | 61.3 mph | calculate → |
| 145/70R18 | 25.99" | +0.53% | -140 mm | 60.3 mph | calculate → |
| 26x12.00R18 | 26.00" | +0.56% | +20 mm | 60.3 mph | calculate → |
| 26x6.00R18 | 26.00" | +0.56% | -133 mm | 60.3 mph | calculate → |
| 26x8.00R18 | 26.00" | +0.56% | -82 mm | 60.3 mph | calculate → |
| 155/60R18 | 25.32" | -2.06% | -130 mm | 58.8 mph | calculate → |
| 305/30R18 | 25.20" | -2.51% | +20 mm | 58.5 mph | calculate → |
| 155/70R18 | 26.54" | +2.66% | -130 mm | 61.6 mph | calculate → |
| 325/35R18 | 26.96" | +4.26% | +40 mm | 62.6 mph | calculate → |
| 165/70R18 | 27.09" | +4.80% | -120 mm | 62.9 mph | calculate → |
| 145/80R18 | 27.13" | +4.95% | -140 mm | 63.0 mph | calculate → |
| 345/30R18 | 26.15" | +1.14% | +60 mm | 60.7 mph | calculate → |
| 205/45R18 | 25.26" | -2.28% | -80 mm | 58.6 mph | calculate → |
| 315/35R18 | 26.68" | +3.20% | +30 mm | 61.9 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" | +0.02% | -60 mm | 60.0 mph | compare → |
| 245/45R17 common | 25.68" | -0.67% | -40 mm | 59.6 mph | compare → |
| 255/35R19 common | 26.03" | +0.67% | -30 mm | 60.4 mph | compare → |
| 245/35R19 common | 25.75" | -0.40% | -40 mm | 59.8 mph | compare → |
| 225/40R19 common | 26.09" | +0.90% | -60 mm | 60.5 mph | compare → |
| 285/30R19 | 25.73" | -0.47% | 0 mm | 59.7 mph | compare → |
| 205/55R17 | 25.88" | +0.09% | -80 mm | 60.1 mph | compare → |
| 275/40R17 | 25.66" | -0.75% | -10 mm | 59.6 mph | compare → |
| 295/30R19 | 25.97" | +0.44% | +10 mm | 60.3 mph | compare → |
| 255/45R17 | 26.04" | +0.70% | -30 mm | 60.4 mph | compare → |
| 315/35R17 | 25.68" | -0.67% | +30 mm | 59.6 mph | compare → |
| 285/40R17 | 25.98" | +0.47% | 0 mm | 60.3 mph | calculate → |
| 175/65R17 | 25.96" | +0.40% | -110 mm | 60.2 mph | calculate → |
| 185/60R17 | 25.74" | -0.44% | -100 mm | 59.7 mph | calculate → |
| 26x6.00R17 | 26.00" | +0.56% | -133 mm | 60.3 mph | calculate → |
| 165/70R17 | 26.09" | +0.93% | -120 mm | 60.6 mph | calculate → |
Try another size against 285/35R18
Questions
What size is 285/35R18 in inches?
285/35R18 is about 25.9" tall and 11.2" wide on a 18-inch rim — roughly a 26x11.00R18 in inch sizing.
What does 285/35R18 mean?
285 mm section width, sidewall 35% of the width (3.93"), radial construction, 18-inch rim.
What tire sizes are equivalent to 285/35R18?
On the same 18" rim, within 3% of the diameter: 335/30R18 (+0.23%), 225/45R18 (+0.46%), 145/70R18 (+0.53%), 245/40R18 (-0.53%), 26x12.00R18 (+0.56%), 26x6.00R18 (+0.56%).
How many revolutions per mile does a 285/35R18 tire make?
About 780 revolutions per mile (circumference 81.2").
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.