235/55R17 tire size
235/55R17 is a metric size: 27.2" tall, 9.3" wide, on a 17" rim — about a 27x9.50R17. The sidewall is 5.1" and the tire turns 742 times per mile.
235/55R17 specs
| Overall diameter (height) | 27.18" · 690 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 5.09" · 129 mm (55% of width) |
| Rim diameter | 17" |
| Circumference | 85.38" · 2.169 m |
| Revolutions per mile | 742 (461 per km) |
| Inch (flotation) equivalent | 27x9.50R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 225/50R17 common | 25.86" | -4.85% | -10 mm | 57.1 mph | compare → |
| 225/55R17 common | 26.74" | -1.59% | -10 mm | 59.0 mph | compare → |
| 225/65R17 common | 28.52" | +4.93% | -10 mm | 63.0 mph | compare → |
| 215/55R17 common | 26.31" | -3.19% | -20 mm | 58.1 mph | compare → |
| 225/60R17 common | 27.63" | +1.67% | -10 mm | 61.0 mph | compare → |
| 235/60R17 common | 28.10" | +3.40% | 0 mm | 62.0 mph | compare → |
| 215/65R17 common | 28.00" | +3.04% | -20 mm | 61.8 mph | compare → |
| 215/60R17 common | 27.16" | -0.07% | -20 mm | 60.0 mph | compare → |
| 235/50R17 common | 26.25" | -3.40% | 0 mm | 58.0 mph | compare → |
| 205/55R17 | 25.88" | -4.78% | -30 mm | 57.1 mph | compare → |
| 245/50R17 | 26.65" | -1.96% | +10 mm | 58.8 mph | compare → |
| 255/45R17 | 26.04" | -4.20% | +20 mm | 57.5 mph | compare → |
| 245/55R17 | 27.61" | +1.59% | +10 mm | 61.0 mph | calculate → |
| 335/35R17 | 26.23" | -3.48% | +100 mm | 57.9 mph | calculate → |
| 255/50R17 | 27.04" | -0.51% | +20 mm | 59.7 mph | calculate → |
| 165/80R17 | 27.39" | +0.80% | -70 mm | 60.5 mph | calculate → |
| 305/45R17 | 27.81" | +2.32% | +70 mm | 61.4 mph | calculate → |
| 155/90R17 | 27.98" | +2.97% | -80 mm | 61.8 mph | calculate → |
| 255/55R17 | 28.04" | +3.19% | +20 mm | 61.9 mph | calculate → |
| 195/60R17 | 26.21" | -3.55% | -40 mm | 57.9 mph | calculate → |
| 285/40R17 | 25.98" | -4.42% | +50 mm | 57.3 mph | calculate → |
| 155/80R17 | 26.76" | -1.52% | -80 mm | 59.1 mph | calculate → |
| 145/80R17 | 26.13" | -3.84% | -90 mm | 57.7 mph | calculate → |
| 175/65R17 | 25.96" | -4.49% | -60 mm | 57.3 mph | calculate → |
| 145/90R17 | 27.28" | +0.36% | -90 mm | 60.2 mph | calculate → |
| 275/50R17 | 27.83" | +2.39% | +40 mm | 61.4 mph | calculate → |
| 28x6.00R17 | 28.00" | +3.03% | -83 mm | 61.8 mph | calculate → |
| 26x6.00R17 | 26.00" | -4.33% | -83 mm | 57.4 mph | calculate → |
| 205/65R17 | 27.49" | +1.16% | -30 mm | 60.7 mph | calculate → |
| 205/60R17 | 26.69" | -1.81% | -30 mm | 58.9 mph | calculate → |
| 345/40R17 | 27.87" | +2.54% | +110 mm | 61.5 mph | calculate → |
| 295/40R17 | 26.29" | -3.26% | +60 mm | 58.0 mph | calculate → |
| 165/70R17 | 26.09" | -3.98% | -70 mm | 57.6 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/50R18 common | 27.25" | +0.28% | 0 mm | 60.2 mph | compare → |
| 215/65R16 common | 27.00" | -0.64% | -20 mm | 59.6 mph | compare → |
| 255/45R18 common | 27.04" | -0.52% | +20 mm | 59.7 mph | compare → |
| 215/55R18 common | 27.31" | +0.49% | -20 mm | 60.3 mph | compare → |
| 235/60R16 common | 27.10" | -0.28% | 0 mm | 59.8 mph | compare → |
| 205/70R16 | 27.30" | +0.45% | -30 mm | 60.3 mph | compare → |
| 295/40R18 | 27.29" | +0.42% | +60 mm | 60.3 mph | compare → |
| 265/45R18 | 27.39" | +0.78% | +30 mm | 60.5 mph | compare → |
| 285/40R18 | 26.98" | -0.74% | +50 mm | 59.6 mph | calculate → |
| 155/90R16 | 26.98" | -0.71% | -80 mm | 59.6 mph | calculate → |
| 145/80R18 | 27.13" | -0.16% | -90 mm | 59.9 mph | calculate → |
| 165/70R18 | 27.09" | -0.30% | -70 mm | 59.8 mph | calculate → |
| 325/35R18 | 26.96" | -0.81% | +90 mm | 59.5 mph | calculate → |
| 355/40R16 | 27.18" | +0.01% | +120 mm | 60.0 mph | calculate → |
| 195/60R18 | 27.21" | +0.13% | -40 mm | 60.1 mph | calculate → |
Try another size against 235/55R17
Questions
What size is 235/55R17 in inches?
235/55R17 is about 27.2" tall and 9.3" wide on a 17-inch rim — roughly a 27x9.50R17 in inch sizing.
What does 235/55R17 mean?
235 mm section width, sidewall 55% of the width (5.09"), radial construction, 17-inch rim.
What tire sizes are equivalent to 235/55R17?
On the same 17" rim, within 3% of the diameter: 215/60R17 (-0.07%), 145/90R17 (+0.36%), 255/50R17 (-0.51%), 165/80R17 (+0.80%), 205/65R17 (+1.16%), 155/80R17 (-1.52%).
How many revolutions per mile does a 235/55R17 tire make?
About 742 revolutions per mile (circumference 85.4").
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.