275/35R18 tire size
275/35R18 is a metric size: 25.6" tall, 10.8" wide, on a 18" rim — about a 25.5x11.00R18. The sidewall is 3.8" and the tire turns 788 times per mile.
275/35R18 specs
| Overall diameter (height) | 25.58" · 650 mm |
|---|---|
| Section width | 10.83" · 275 mm |
| Sidewall height | 3.79" · 96 mm (35% of width) |
| Rim diameter | 18" |
| Circumference | 80.36" · 2.041 m |
| Revolutions per mile | 788 (490 per km) |
| Inch (flotation) equivalent | 25.5x11.00R18 |
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 | |
|---|---|---|---|---|---|
| 245/40R18 common | 25.72" | +0.54% | -30 mm | 60.3 mph | compare → |
| 225/45R18 common | 25.97" | +1.54% | -50 mm | 60.9 mph | compare → |
| 225/40R18 common | 25.09" | -1.92% | -50 mm | 58.8 mph | compare → |
| 245/45R18 common | 26.68" | +4.31% | -30 mm | 62.6 mph | compare → |
| 235/45R18 common | 26.33" | +2.92% | -40 mm | 61.8 mph | compare → |
| 235/40R18 common | 25.40" | -0.69% | -40 mm | 59.6 mph | compare → |
| 255/35R18 common | 25.03" | -2.15% | -20 mm | 58.7 mph | compare → |
| 255/40R18 common | 26.03" | +1.77% | -20 mm | 61.1 mph | compare → |
| 265/35R18 common | 25.30" | -1.08% | -10 mm | 59.4 mph | compare → |
| 275/40R18 common | 26.66" | +4.23% | 0 mm | 62.5 mph | compare → |
| 215/45R18 common | 25.62" | +0.15% | -60 mm | 60.1 mph | compare → |
| 245/35R18 common | 24.75" | -3.23% | -30 mm | 58.1 mph | compare → |
| 215/40R18 | 24.77" | -3.16% | -60 mm | 58.1 mph | compare → |
| 285/35R18 | 25.85" | +1.08% | +10 mm | 60.6 mph | compare → |
| 265/40R18 | 26.35" | +3.00% | -10 mm | 61.8 mph | compare → |
| 295/30R18 | 24.97" | -2.39% | +20 mm | 58.6 mph | compare → |
| 315/30R18 | 25.44" | -0.54% | +40 mm | 59.7 mph | compare → |
| 285/30R18 | 24.73" | -3.31% | +10 mm | 58.0 mph | compare → |
| 295/35R18 | 26.13" | +2.15% | +20 mm | 61.3 mph | compare → |
| 205/40R18 | 24.46" | -4.39% | -70 mm | 57.4 mph | compare → |
| 335/30R18 | 25.91" | +1.31% | +60 mm | 60.8 mph | compare → |
| 215/50R18 | 26.46" | +3.46% | -60 mm | 62.1 mph | compare → |
| 305/35R18 | 26.41" | +3.23% | +30 mm | 61.9 mph | calculate → |
| 235/35R18 | 24.48" | -4.31% | -40 mm | 57.4 mph | calculate → |
| 155/60R18 | 25.32" | -1.00% | -120 mm | 59.4 mph | calculate → |
| 305/30R18 | 25.20" | -1.46% | +30 mm | 59.1 mph | calculate → |
| 145/70R18 | 25.99" | +1.62% | -130 mm | 61.0 mph | calculate → |
| 26x12.00R18 | 26.00" | +1.65% | +30 mm | 61.0 mph | calculate → |
| 26x6.00R18 | 26.00" | +1.65% | -123 mm | 61.0 mph | calculate → |
| 26x8.00R18 | 26.00" | +1.65% | -72 mm | 61.0 mph | calculate → |
| 155/70R18 | 26.54" | +3.77% | -120 mm | 62.3 mph | calculate → |
| 205/45R18 | 25.26" | -1.23% | -70 mm | 59.3 mph | calculate → |
| 345/30R18 | 26.15" | +2.23% | +70 mm | 61.3 mph | calculate → |
| 315/35R18 | 26.68" | +4.31% | +40 mm | 62.6 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 | |
|---|---|---|---|---|---|
| 215/50R17 common | 25.46" | -0.45% | -60 mm | 59.7 mph | compare → |
| 235/45R17 common | 25.33" | -0.99% | -40 mm | 59.4 mph | compare → |
| 245/45R17 common | 25.68" | +0.40% | -30 mm | 60.2 mph | compare → |
| 245/35R19 common | 25.75" | +0.68% | -30 mm | 60.4 mph | compare → |
| 235/35R19 common | 25.48" | -0.40% | -40 mm | 59.8 mph | compare → |
| 285/30R19 | 25.73" | +0.60% | +10 mm | 60.4 mph | compare → |
| 275/40R17 | 25.66" | +0.32% | 0 mm | 60.2 mph | compare → |
| 275/30R19 | 25.50" | -0.32% | 0 mm | 59.8 mph | compare → |
| 315/35R17 | 25.68" | +0.40% | +40 mm | 60.2 mph | compare → |
| 155/70R17 | 25.54" | -0.14% | -120 mm | 59.9 mph | calculate → |
| 265/40R17 | 25.35" | -0.91% | -10 mm | 59.5 mph | calculate → |
| 185/60R17 | 25.74" | +0.63% | -90 mm | 60.4 mph | calculate → |
Try another size against 275/35R18
Questions
What size is 275/35R18 in inches?
275/35R18 is about 25.6" tall and 10.8" wide on a 18-inch rim — roughly a 25.5x11.00R18 in inch sizing.
What does 275/35R18 mean?
275 mm section width, sidewall 35% of the width (3.79"), radial construction, 18-inch rim.
What tire sizes are equivalent to 275/35R18?
On the same 18" rim, within 3% of the diameter: 215/45R18 (+0.15%), 245/40R18 (+0.54%), 315/30R18 (-0.54%), 235/40R18 (-0.69%), 155/60R18 (-1.00%), 265/35R18 (-1.08%).
How many revolutions per mile does a 275/35R18 tire make?
About 788 revolutions per mile (circumference 80.4").
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.