215/50R13 tire size
215/50R13 is a metric size: 21.5" tall, 8.5" wide, on a 13" rim — about a 21.5x8.50R13. The sidewall is 4.2" and the tire turns 940 times per mile.
215/50R13 specs
| Overall diameter (height) | 21.46" · 545 mm |
|---|---|
| Section width | 8.46" · 215 mm |
| Sidewall height | 4.23" · 108 mm (50% of width) |
| Rim diameter | 13" |
| Circumference | 67.43" · 1.713 m |
| Revolutions per mile | 940 (584 per km) |
| Inch (flotation) equivalent | 21.5x8.50R13 |
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" | +1.28% | -30 mm | 60.8 mph | calculate → |
| 225/45R13 | 20.97" | -2.29% | +10 mm | 58.6 mph | calculate → |
| 225/50R13 | 21.86" | +1.83% | +10 mm | 61.1 mph | calculate → |
| 255/40R13 | 21.03" | -2.02% | +40 mm | 58.8 mph | calculate → |
| 175/65R13 | 21.96" | +2.29% | -40 mm | 61.4 mph | calculate → |
| 22x8.00R13 | 22.00" | +2.49% | -12 mm | 61.5 mph | calculate → |
| 165/65R13 | 21.44" | -0.09% | -50 mm | 59.9 mph | calculate → |
| 155/70R13 | 21.54" | +0.37% | -60 mm | 60.2 mph | calculate → |
Try another size against 215/50R13
Questions
What size is 215/50R13 in inches?
215/50R13 is about 21.5" tall and 8.5" wide on a 13-inch rim — roughly a 21.5x8.50R13 in inch sizing.
What does 215/50R13 mean?
215 mm section width, sidewall 50% of the width (4.23"), radial construction, 13-inch rim.
What tire sizes are equivalent to 215/50R13?
On the same 13" rim, within 3% of the diameter: 165/65R13 (-0.09%), 155/70R13 (+0.37%), 185/60R13 (+1.28%), 225/50R13 (+1.83%), 255/40R13 (-2.02%), 175/65R13 (+2.29%).
How many revolutions per mile does a 215/50R13 tire make?
About 940 revolutions per mile (circumference 67.4").
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.