235/50R20 tire size
235/50R20 is a metric size: 29.3" tall, 9.3" wide, on a 20" rim — about a 29.5x9.50R20. The sidewall is 4.6" and the tire turns 689 times per mile.
235/50R20 specs
| Overall diameter (height) | 29.25" · 743 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 4.63" · 118 mm (50% of width) |
| Rim diameter | 20" |
| Circumference | 91.90" · 2.334 m |
| Revolutions per mile | 689 (428 per km) |
| Inch (flotation) equivalent | 29.5x9.50R20 |
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" | -1.95% | +10 mm | 58.8 mph | compare → |
| 255/45R20 common | 29.04" | -0.74% | +20 mm | 59.6 mph | compare → |
| 275/40R20 common | 28.66" | -2.02% | +40 mm | 58.8 mph | compare → |
| 255/50R20 common | 30.04" | +2.69% | +20 mm | 61.6 mph | compare → |
| 265/50R20 common | 30.43" | +4.04% | +30 mm | 62.4 mph | compare → |
| 245/50R20 common | 29.65" | +1.35% | +10 mm | 60.8 mph | compare → |
| 275/45R20 common | 29.74" | +1.68% | +40 mm | 61.0 mph | compare → |
| 235/55R20 common | 30.18" | +3.16% | 0 mm | 61.9 mph | compare → |
| 255/40R20 common | 28.03" | -4.17% | +20 mm | 57.5 mph | compare → |
| 265/45R20 common | 29.39" | +0.47% | +30 mm | 60.3 mph | compare → |
| 285/35R20 common | 27.85" | -4.78% | +50 mm | 57.1 mph | compare → |
| 315/35R20 common | 28.68" | -1.95% | +80 mm | 58.8 mph | compare → |
| 295/40R20 | 29.29" | +0.13% | +60 mm | 60.1 mph | compare → |
| 295/35R20 | 28.13" | -3.84% | +60 mm | 57.7 mph | compare → |
| 305/35R20 | 28.41" | -2.89% | +70 mm | 58.3 mph | compare → |
| 285/40R20 | 28.98" | -0.94% | +50 mm | 59.4 mph | compare → |
| 285/45R20 | 30.10" | +2.89% | +50 mm | 61.7 mph | compare → |
| 235/45R20 | 28.33" | -3.16% | 0 mm | 58.1 mph | compare → |
| 295/45R20 | 30.45" | +4.10% | +60 mm | 62.5 mph | compare → |
| 265/40R20 | 28.35" | -3.10% | +30 mm | 58.1 mph | compare → |
| 305/40R20 | 29.61" | +1.21% | +70 mm | 60.7 mph | compare → |
| 335/30R20 | 27.91" | -4.58% | +100 mm | 57.3 mph | calculate → |
| 345/30R20 | 28.15" | -3.77% | +110 mm | 57.7 mph | calculate → |
| 325/35R20 | 28.96" | -1.01% | +90 mm | 59.4 mph | calculate → |
| 29x15.00R20 | 29.00" | -0.86% | +146 mm | 59.5 mph | calculate → |
| 29x18.00R20 | 29.00" | -0.86% | +222 mm | 59.5 mph | calculate → |
| 175/70R20 | 29.65" | +1.35% | -60 mm | 60.8 mph | calculate → |
| 195/55R20 | 28.44" | -2.76% | -40 mm | 58.3 mph | calculate → |
| 225/45R20 | 27.97" | -4.37% | -10 mm | 57.4 mph | calculate → |
| 155/65R20 | 27.93" | -4.51% | -80 mm | 57.3 mph | calculate → |
| 165/60R20 | 27.80" | -4.98% | -70 mm | 57.0 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 | |
|---|---|---|---|---|---|
| 235/55R19 common | 29.18" | -0.26% | 0 mm | 59.8 mph | compare → |
| 255/50R19 common | 29.04" | -0.73% | +20 mm | 59.6 mph | compare → |
| 265/50R19 common | 29.43" | +0.62% | +30 mm | 60.4 mph | compare → |
| 265/40R21 common | 29.35" | +0.32% | +30 mm | 60.2 mph | compare → |
| 295/35R21 | 29.13" | -0.42% | +60 mm | 59.7 mph | compare → |
| 255/40R21 | 29.03" | -0.75% | +20 mm | 59.5 mph | compare → |
| 285/45R19 | 29.10" | -0.52% | +50 mm | 59.7 mph | compare → |
| 235/45R21 | 29.33" | +0.26% | 0 mm | 60.2 mph | calculate → |
| 305/35R21 | 29.41" | +0.52% | +70 mm | 60.3 mph | calculate → |
| 295/45R19 | 29.45" | +0.69% | +60 mm | 60.4 mph | calculate → |
| 345/30R21 | 29.15" | -0.35% | +110 mm | 59.8 mph | calculate → |
| 225/45R21 | 28.97" | -0.96% | -10 mm | 59.4 mph | calculate → |
Try another size against 235/50R20
Questions
What size is 235/50R20 in inches?
235/50R20 is about 29.3" tall and 9.3" wide on a 20-inch rim — roughly a 29.5x9.50R20 in inch sizing.
What does 235/50R20 mean?
235 mm section width, sidewall 50% of the width (4.63"), radial construction, 20-inch rim.
What tire sizes are equivalent to 235/50R20?
On the same 20" rim, within 3% of the diameter: 295/40R20 (+0.13%), 265/45R20 (+0.47%), 255/45R20 (-0.74%), 29x15.00R20 (-0.86%), 29x18.00R20 (-0.86%), 285/40R20 (-0.94%).
How many revolutions per mile does a 235/50R20 tire make?
About 689 revolutions per mile (circumference 91.9").
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.