285/35R20 tire size
285/35R20 is a metric size: 27.9" tall, 11.2" wide, on a 20" rim — about a 28x11.00R20. The sidewall is 3.9" and the tire turns 724 times per mile.
285/35R20 specs
| Overall diameter (height) | 27.85" · 708 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 3.93" · 100 mm (35% of width) |
| Rim diameter | 20" |
| Circumference | 87.51" · 2.223 m |
| Revolutions per mile | 724 (450 per km) |
| Inch (flotation) equivalent | 28x11.00R20 |
Equivalent sizes on a 20" 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 | |
|---|---|---|---|---|---|
| 245/45R20 common | 28.68" | +2.97% | -40 mm | 61.8 mph | compare → |
| 255/45R20 common | 29.04" | +4.24% | -30 mm | 62.5 mph | compare → |
| 275/40R20 common | 28.66" | +2.90% | -10 mm | 61.7 mph | compare → |
| 245/40R20 common | 27.72" | -0.49% | -40 mm | 59.7 mph | compare → |
| 245/35R20 common | 26.75" | -3.96% | -40 mm | 57.6 mph | compare → |
| 255/35R20 common | 27.03" | -2.97% | -30 mm | 58.2 mph | compare → |
| 255/40R20 common | 28.03" | +0.64% | -30 mm | 60.4 mph | compare → |
| 275/35R20 common | 27.58" | -0.99% | -10 mm | 59.4 mph | compare → |
| 315/35R20 common | 28.68" | +2.97% | +30 mm | 61.8 mph | compare → |
| 285/30R20 common | 26.73" | -4.03% | 0 mm | 57.6 mph | compare → |
| 275/30R20 common | 26.50" | -4.88% | -10 mm | 57.1 mph | compare → |
| 265/35R20 common | 27.30" | -1.98% | -20 mm | 58.8 mph | compare → |
| 235/35R20 | 26.48" | -4.95% | -50 mm | 57.0 mph | compare → |
| 295/30R20 | 26.97" | -3.18% | +10 mm | 58.1 mph | compare → |
| 305/30R20 | 27.20" | -2.33% | +20 mm | 58.6 mph | compare → |
| 295/35R20 | 28.13" | +0.99% | +10 mm | 60.6 mph | compare → |
| 305/35R20 | 28.41" | +1.98% | +20 mm | 61.2 mph | compare → |
| 285/40R20 | 28.98" | +4.03% | 0 mm | 62.4 mph | compare → |
| 235/45R20 | 28.33" | +1.70% | -50 mm | 61.0 mph | compare → |
| 265/40R20 | 28.35" | +1.77% | -20 mm | 61.1 mph | compare → |
| 335/25R20 | 26.59" | -4.52% | +50 mm | 57.3 mph | compare → |
| 315/30R20 | 27.44" | -1.48% | +30 mm | 59.1 mph | compare → |
| 235/40R20 | 27.40" | -1.63% | -50 mm | 59.0 mph | calculate → |
| 335/30R20 | 27.91" | +0.21% | +50 mm | 60.1 mph | calculate → |
| 325/30R20 | 27.68" | -0.64% | +40 mm | 59.6 mph | calculate → |
| 345/30R20 | 28.15" | +1.06% | +60 mm | 60.6 mph | calculate → |
| 215/45R20 | 27.62" | -0.85% | -70 mm | 59.5 mph | calculate → |
| 345/25R20 | 26.79" | -3.82% | +60 mm | 57.7 mph | calculate → |
| 195/50R20 | 27.68" | -0.64% | -90 mm | 59.6 mph | calculate → |
| 225/40R20 | 27.09" | -2.76% | -60 mm | 58.3 mph | calculate → |
| 325/35R20 | 28.96" | +3.96% | +40 mm | 62.4 mph | calculate → |
| 175/55R20 | 27.58" | -0.99% | -110 mm | 59.4 mph | calculate → |
| 145/65R20 | 27.42" | -1.55% | -140 mm | 59.1 mph | calculate → |
| 155/60R20 | 27.32" | -1.91% | -130 mm | 58.9 mph | calculate → |
| 145/60R20 | 26.85" | -3.60% | -140 mm | 57.8 mph | calculate → |
| 29x15.00R20 | 29.00" | +4.11% | +96 mm | 62.5 mph | calculate → |
| 29x18.00R20 | 29.00" | +4.11% | +172 mm | 62.5 mph | calculate → |
| 165/60R20 | 27.80" | -0.21% | -120 mm | 59.9 mph | calculate → |
| 155/65R20 | 27.93" | +0.28% | -130 mm | 60.2 mph | calculate → |
| 225/45R20 | 27.97" | +0.42% | -60 mm | 60.3 mph | calculate → |
| 195/55R20 | 28.44" | +2.12% | -90 mm | 61.3 mph | calculate → |
Plus / minus sizing: 19" and 21" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 245/45R19 common | 27.68" | -0.62% | -40 mm | 59.6 mph | compare → |
| 255/45R19 common | 28.04" | +0.65% | -30 mm | 60.4 mph | compare → |
| 275/40R19 common | 27.66" | -0.69% | -10 mm | 59.6 mph | compare → |
| 245/35R21 | 27.75" | -0.37% | -40 mm | 59.8 mph | compare → |
| 285/40R19 | 27.98" | +0.44% | 0 mm | 60.3 mph | compare → |
| 255/35R21 | 28.03" | +0.62% | -30 mm | 60.4 mph | compare → |
| 295/30R21 | 27.97" | +0.41% | +10 mm | 60.2 mph | compare → |
| 285/30R21 | 27.73" | -0.44% | 0 mm | 59.7 mph | compare → |
| 355/25R21 | 27.99" | +0.48% | +70 mm | 60.3 mph | calculate → |
| 345/25R21 | 27.79" | -0.23% | +60 mm | 59.9 mph | calculate → |
| 315/35R19 | 27.68" | -0.62% | +30 mm | 59.6 mph | calculate → |
| 225/50R19 | 27.86" | +0.01% | -60 mm | 60.0 mph | calculate → |
Try another size against 285/35R20
Questions
What size is 285/35R20 in inches?
285/35R20 is about 27.9" tall and 11.2" wide on a 20-inch rim — roughly a 28x11.00R20 in inch sizing.
What does 285/35R20 mean?
285 mm section width, sidewall 35% of the width (3.93"), radial construction, 20-inch rim.
What tire sizes are equivalent to 285/35R20?
On the same 20" rim, within 3% of the diameter: 335/30R20 (+0.21%), 165/60R20 (-0.21%), 155/65R20 (+0.28%), 225/45R20 (+0.42%), 245/40R20 (-0.49%), 195/50R20 (-0.64%).
How many revolutions per mile does a 285/35R20 tire make?
About 724 revolutions per mile (circumference 87.5").
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.