195/55R20 tire size
195/55R20 is a metric size: 28.4" tall, 7.7" wide, on a 20" rim — about a 28.5x7.50R20. The sidewall is 4.2" and the tire turns 709 times per mile.
195/55R20 specs
| Overall diameter (height) | 28.44" · 722 mm |
|---|---|
| Section width | 7.68" · 195 mm |
| Sidewall height | 4.22" · 107 mm (55% of width) |
| Rim diameter | 20" |
| Circumference | 89.36" · 2.270 m |
| Revolutions per mile | 709 (441 per km) |
| Inch (flotation) equivalent | 28.5x7.50R20 |
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" | +0.83% | +50 mm | 60.5 mph | calculate → |
| 255/45R20 common | 29.04" | +2.08% | +60 mm | 61.2 mph | calculate → |
| 275/40R20 common | 28.66" | +0.76% | +80 mm | 60.5 mph | calculate → |
| 245/40R20 common | 27.72" | -2.56% | +50 mm | 58.5 mph | calculate → |
| 245/50R20 common | 29.65" | +4.22% | +50 mm | 62.5 mph | calculate → |
| 275/45R20 common | 29.74" | +4.57% | +80 mm | 62.7 mph | calculate → |
| 255/35R20 common | 27.03" | -4.98% | +60 mm | 57.0 mph | calculate → |
| 255/40R20 common | 28.03" | -1.45% | +60 mm | 59.1 mph | calculate → |
| 275/35R20 common | 27.58" | -3.04% | +80 mm | 58.2 mph | calculate → |
| 265/45R20 common | 29.39" | +3.32% | +70 mm | 62.0 mph | calculate → |
| 285/35R20 common | 27.85" | -2.08% | +90 mm | 58.8 mph | calculate → |
| 315/35R20 common | 28.68" | +0.83% | +120 mm | 60.5 mph | calculate → |
| 265/35R20 common | 27.30" | -4.01% | +70 mm | 57.6 mph | calculate → |
| 305/30R20 | 27.20" | -4.36% | +110 mm | 57.4 mph | calculate → |
| 295/40R20 | 29.29" | +2.98% | +100 mm | 61.8 mph | calculate → |
| 295/35R20 | 28.13" | -1.11% | +100 mm | 59.3 mph | calculate → |
| 305/35R20 | 28.41" | -0.14% | +110 mm | 59.9 mph | calculate → |
| 285/40R20 | 28.98" | +1.87% | +90 mm | 61.1 mph | calculate → |
| 235/50R20 | 29.25" | +2.84% | +40 mm | 61.7 mph | calculate → |
| 235/45R20 | 28.33" | -0.42% | +40 mm | 59.8 mph | calculate → |
| 265/40R20 | 28.35" | -0.35% | +70 mm | 59.8 mph | calculate → |
| 305/40R20 | 29.61" | +4.08% | +110 mm | 62.4 mph | calculate → |
| 315/30R20 | 27.44" | -3.53% | +120 mm | 57.9 mph | calculate → |
| 235/40R20 | 27.40" | -3.67% | +40 mm | 57.8 mph | calculate → |
| 335/30R20 | 27.91" | -1.87% | +140 mm | 58.9 mph | calculate → |
| 325/30R20 | 27.68" | -2.70% | +130 mm | 58.4 mph | calculate → |
| 345/30R20 | 28.15" | -1.04% | +150 mm | 59.4 mph | calculate → |
| 215/45R20 | 27.62" | -2.91% | +20 mm | 58.3 mph | calculate → |
| 325/35R20 | 28.96" | +1.80% | +130 mm | 61.1 mph | calculate → |
| 195/50R20 | 27.68" | -2.70% | 0 mm | 58.4 mph | calculate → |
| 225/40R20 | 27.09" | -4.78% | +30 mm | 57.1 mph | calculate → |
| 29x15.00R20 | 29.00" | +1.95% | +186 mm | 61.2 mph | calculate → |
| 29x18.00R20 | 29.00" | +1.95% | +262 mm | 61.2 mph | calculate → |
| 175/55R20 | 27.58" | -3.04% | -20 mm | 58.2 mph | calculate → |
| 145/65R20 | 27.42" | -3.60% | -50 mm | 57.8 mph | calculate → |
| 155/60R20 | 27.32" | -3.94% | -40 mm | 57.6 mph | calculate → |
| 225/45R20 | 27.97" | -1.66% | +30 mm | 59.0 mph | calculate → |
| 155/65R20 | 27.93" | -1.80% | -40 mm | 58.9 mph | calculate → |
| 165/60R20 | 27.80" | -2.28% | -30 mm | 58.6 mph | calculate → |
| 175/70R20 | 29.65" | +4.22% | -20 mm | 62.5 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 | |
|---|---|---|---|---|---|
| 235/50R19 common | 28.25" | -0.68% | +40 mm | 59.6 mph | calculate → |
| 245/50R19 common | 28.65" | +0.71% | +50 mm | 60.4 mph | calculate → |
| 275/35R21 common | 28.58" | +0.47% | +80 mm | 60.3 mph | calculate → |
| 265/35R21 | 28.30" | -0.50% | +70 mm | 59.7 mph | calculate → |
| 325/30R21 | 28.68" | +0.82% | +130 mm | 60.5 mph | calculate → |
| 315/30R21 | 28.44" | -0.01% | +120 mm | 60.0 mph | calculate → |
| 245/40R21 | 28.72" | +0.96% | +50 mm | 60.6 mph | calculate → |
| 305/30R21 | 28.20" | -0.84% | +110 mm | 59.5 mph | calculate → |
| 295/40R19 | 28.29" | -0.54% | +100 mm | 59.7 mph | calculate → |
| 265/45R19 | 28.39" | -0.19% | +70 mm | 59.9 mph | calculate → |
| 345/35R19 | 28.51" | +0.22% | +150 mm | 60.1 mph | calculate → |
Try another size against 195/55R20
Questions
What size is 195/55R20 in inches?
195/55R20 is about 28.4" tall and 7.7" wide on a 20-inch rim — roughly a 28.5x7.50R20 in inch sizing.
What does 195/55R20 mean?
195 mm section width, sidewall 55% of the width (4.22"), radial construction, 20-inch rim.
What tire sizes are equivalent to 195/55R20?
On the same 20" rim, within 3% of the diameter: 305/35R20 (-0.14%), 265/40R20 (-0.35%), 235/45R20 (-0.42%), 275/40R20 (+0.76%), 245/45R20 (+0.83%), 315/35R20 (+0.83%).
How many revolutions per mile does a 195/55R20 tire make?
About 709 revolutions per mile (circumference 89.4").
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.