155/70R13 tire size
155/70R13 is a metric size: 21.5" tall, 6.1" wide, on a 13" rim — about a 21.5x6.00R13. The sidewall is 4.3" and the tire turns 936 times per mile.
155/70R13 specs
| Overall diameter (height) | 21.54" · 547 mm |
|---|---|
| Section width | 6.10" · 155 mm |
| Sidewall height | 4.27" · 109 mm (70% of width) |
| Rim diameter | 13" |
| Circumference | 67.68" · 1.719 m |
| Revolutions per mile | 936 (582 per km) |
| Inch (flotation) equivalent | 21.5x6.00R13 |
Equivalent sizes on a 13" 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 | |
|---|---|---|---|---|---|
| 185/60R13 | 21.74" | +0.91% | +30 mm | 60.5 mph | calculate → |
| 225/45R13 | 20.97" | -2.65% | +70 mm | 58.4 mph | calculate → |
| 225/50R13 | 21.86" | +1.46% | +70 mm | 60.9 mph | calculate → |
| 175/65R13 | 21.96" | +1.92% | +20 mm | 61.2 mph | calculate → |
| 22x8.00R13 | 22.00" | +2.12% | +48 mm | 61.3 mph | calculate → |
| 255/40R13 | 21.03" | -2.38% | +100 mm | 58.6 mph | calculate → |
| 215/50R13 | 21.46" | -0.37% | +60 mm | 59.8 mph | calculate → |
| 165/65R13 | 21.44" | -0.46% | +10 mm | 59.7 mph | calculate → |
Try another size against 155/70R13
Questions
What size is 155/70R13 in inches?
155/70R13 is about 21.5" tall and 6.1" wide on a 13-inch rim — roughly a 21.5x6.00R13 in inch sizing.
What does 155/70R13 mean?
155 mm section width, sidewall 70% of the width (4.27"), radial construction, 13-inch rim.
What tire sizes are equivalent to 155/70R13?
On the same 13" rim, within 3% of the diameter: 215/50R13 (-0.37%), 165/65R13 (-0.46%), 185/60R13 (+0.91%), 225/50R13 (+1.46%), 175/65R13 (+1.92%), 22x8.00R13 (+2.12%).
How many revolutions per mile does a 155/70R13 tire make?
About 936 revolutions per mile (circumference 67.7").
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.