185/70R13 dimensions
| Measure | Inches | Millimetres |
|---|---|---|
| Overall height | 23.20 in | 589 mm |
| Section width | 7.28 in | 185 mm |
| Sidewall height | 5.10 in | 129.5 mm |
| Wheel diameter | 13 in | 330 mm |
| Circumference | 72.9 in | 1,851 mm |
| Revolutions per mile | 869.4 |
The math
| Step | Math | Result |
|---|---|---|
| Sidewall | 185 × 70% = 129.5 mm ÷ 25.4 | 5.10 in |
| Overall height | 13 + 2 × 5.10 | 23.20 in |
| Width | 185 mm ÷ 25.4 | 7.28 in |
| Circumference | π × 23.20 | 72.9 in |
| Revs per mile | 63,360 ÷ 72.9 | 869.4 |
With a 5.1 in sidewall this is a medium sidewall: a balance of cushion and response. Real tires vary by brand and model, and the loaded radius under the vehicle is a bit smaller than this unloaded figure.
One step either way on a 13 in wheel
Each row changes one thing and shows the height change against 185/70R13, plus what 60 mph on the speedometer would really be if you swapped to that size.
| Change | Size | Height | Height change | 60 mph shows as | Verdict |
|---|---|---|---|---|---|
| Wider | 195/70R13 (compare) | 23.7 in | +2.4% | 61.4 mph | Close match |
| Narrower | 175/70R13 (compare) | 22.6 in | -2.4% | 58.6 mph | Close match |
| Taller sidewall | 185/75R13 (compare) | 23.9 in | +3.1% | 61.9 mph | Check clearance |
| Shorter sidewall | 185/65R13 (compare) | 22.5 in | -3.1% | 58.1 mph | Check clearance |
| Wider, shorter sidewall | 195/65R13 (compare) | 23.0 in | -0.9% | 59.4 mph | Close match |
| Narrower, taller sidewall | 175/75R13 (compare) | 23.3 in | +0.6% | 60.4 mph | Close match |
Calculated sizes within ±3% on other wheels
Plus and minus sizes that keep the overall height within about 3% (a rule of thumb from Discount Tire and 1010tires), widths within 30 mm. Calculated, not a list of tires on sale: check that a tire exists in that size.
14 in wheels (one wheel size larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 195/60R14 (compare) | 23.2 in | +0.1% | +10 mm |
| 155/75R14 (compare) | 23.2 in | -0.2% | -30 mm |
| 165/70R14 (compare) | 23.1 in | -0.4% | -20 mm |
| 215/55R14 (compare) | 23.3 in | +0.5% | +30 mm |
15 in wheels (two wheel sizes larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 175/60R15 (compare) | 23.3 in | +0.3% | -10 mm |
| 205/50R15 (compare) | 23.1 in | -0.5% | +20 mm |
| 185/55R15 (compare) | 23.0 in | -0.8% | +0 mm |
| 165/65R15 (compare) | 23.4 in | +1.1% | -20 mm |
Try it with your numbers
Compare 185/70R13 with another size · Convert to metric or find a 33 in size · Sizes that fit my wheel
Calculated from the size alone. Real tires vary a little by brand and model, and the loaded radius is a bit smaller. Confirm the wheel width range, clearance, load index and speed rating for your vehicle. See how to read a tire size, the load index chart and the speed rating chart.
Browse: all sizes in inches · 175/70R13 · 165/65R14.