155/70R17 tire size
155/70R17 is a metric size: 25.5" tall, 6.1" wide, on a 17" rim — about a 25.5x6.00R17. The sidewall is 4.3" and the tire turns 790 times per mile.
155/70R17 specs
| Overall diameter (height) | 25.54" · 649 mm |
|---|---|
| Section width | 6.10" · 155 mm |
| Sidewall height | 4.27" · 109 mm (70% of width) |
| Rim diameter | 17" |
| Circumference | 80.25" · 2.038 m |
| Revolutions per mile | 790 (491 per km) |
| Inch (flotation) equivalent | 25.5x6.00R17 |
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 | |
|---|---|---|---|---|---|
| 225/45R17 common | 24.97" | -2.23% | +70 mm | 58.7 mph | calculate → |
| 225/50R17 common | 25.86" | +1.23% | +70 mm | 60.7 mph | calculate → |
| 225/55R17 common | 26.74" | +4.70% | +70 mm | 62.8 mph | calculate → |
| 215/45R17 common | 24.62" | -3.62% | +60 mm | 57.8 mph | calculate → |
| 205/50R17 common | 25.07" | -1.85% | +50 mm | 58.9 mph | calculate → |
| 215/55R17 common | 26.31" | +3.01% | +60 mm | 61.8 mph | calculate → |
| 215/50R17 common | 25.46" | -0.31% | +60 mm | 59.8 mph | calculate → |
| 235/45R17 common | 25.33" | -0.85% | +80 mm | 59.5 mph | calculate → |
| 245/45R17 common | 25.68" | +0.54% | +90 mm | 60.3 mph | calculate → |
| 245/40R17 common | 24.72" | -3.24% | +90 mm | 58.1 mph | calculate → |
| 235/50R17 common | 26.25" | +2.77% | +80 mm | 61.7 mph | calculate → |
| 255/40R17 common | 25.03" | -2.00% | +100 mm | 58.8 mph | calculate → |
| 205/55R17 | 25.88" | +1.31% | +50 mm | 60.8 mph | calculate → |
| 275/40R17 | 25.66" | +0.46% | +120 mm | 60.3 mph | calculate → |
| 245/50R17 | 26.65" | +4.32% | +90 mm | 62.6 mph | calculate → |
| 235/40R17 | 24.40" | -4.47% | +80 mm | 57.3 mph | calculate → |
| 255/45R17 | 26.04" | +1.93% | +100 mm | 61.2 mph | calculate → |
| 315/35R17 | 25.68" | +0.54% | +160 mm | 60.3 mph | calculate → |
| 335/35R17 | 26.23" | +2.70% | +180 mm | 61.6 mph | calculate → |
| 275/35R17 | 24.58" | -3.78% | +120 mm | 57.7 mph | calculate → |
| 265/40R17 | 25.35" | -0.77% | +110 mm | 59.5 mph | calculate → |
| 285/40R17 | 25.98" | +1.70% | +130 mm | 61.0 mph | calculate → |
| 195/60R17 | 26.21" | +2.62% | +40 mm | 61.6 mph | calculate → |
| 175/65R17 | 25.96" | +1.62% | +20 mm | 61.0 mph | calculate → |
| 295/35R17 | 25.13" | -1.62% | +140 mm | 59.0 mph | calculate → |
| 145/80R17 | 26.13" | +2.31% | -10 mm | 61.4 mph | calculate → |
| 155/80R17 | 26.76" | +4.78% | 0 mm | 62.9 mph | calculate → |
| 185/60R17 | 25.74" | +0.77% | +30 mm | 60.5 mph | calculate → |
| 26x6.00R17 | 26.00" | +1.79% | -3 mm | 61.1 mph | calculate → |
| 145/70R17 | 24.99" | -2.16% | -10 mm | 58.7 mph | calculate → |
| 165/70R17 | 26.09" | +2.16% | +10 mm | 61.3 mph | calculate → |
| 295/40R17 | 26.29" | +2.93% | +140 mm | 61.8 mph | calculate → |
| 205/60R17 | 26.69" | +4.47% | +50 mm | 62.7 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 | |
|---|---|---|---|---|---|
| 245/40R18 common | 25.72" | +0.68% | +90 mm | 60.4 mph | calculate → |
| 235/40R18 common | 25.40" | -0.55% | +80 mm | 59.7 mph | calculate → |
| 215/55R16 common | 25.31" | -0.91% | +60 mm | 59.5 mph | calculate → |
| 205/60R16 common | 25.69" | +0.55% | +50 mm | 60.3 mph | calculate → |
| 275/35R18 common | 25.58" | +0.14% | +120 mm | 60.1 mph | calculate → |
| 265/35R18 common | 25.30" | -0.94% | +110 mm | 59.4 mph | calculate → |
| 215/45R18 common | 25.62" | +0.29% | +60 mm | 60.2 mph | calculate → |
| 225/55R16 | 25.74" | +0.79% | +70 mm | 60.5 mph | calculate → |
| 315/30R18 | 25.44" | -0.40% | +160 mm | 59.8 mph | calculate → |
| 245/50R16 | 25.65" | +0.40% | +90 mm | 60.2 mph | calculate → |
| 275/45R16 | 25.74" | +0.79% | +120 mm | 60.5 mph | calculate → |
| 155/60R18 | 25.32" | -0.86% | 0 mm | 59.5 mph | calculate → |
| 265/45R16 | 25.39" | -0.60% | +110 mm | 59.6 mph | calculate → |
Try another size against 155/70R17
Questions
What size is 155/70R17 in inches?
155/70R17 is about 25.5" tall and 6.1" wide on a 17-inch rim — roughly a 25.5x6.00R17 in inch sizing.
What does 155/70R17 mean?
155 mm section width, sidewall 70% of the width (4.27"), radial construction, 17-inch rim.
What tire sizes are equivalent to 155/70R17?
On the same 17" rim, within 3% of the diameter: 215/50R17 (-0.31%), 275/40R17 (+0.46%), 245/45R17 (+0.54%), 315/35R17 (+0.54%), 185/60R17 (+0.77%), 265/40R17 (-0.77%).
How many revolutions per mile does a 155/70R17 tire make?
About 790 revolutions per mile (circumference 80.2").
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.