ElpiAuto32X11.50R15 in metric
A 32X11.50R15 is 32.0″ (813 mm) tall and 11.50″ (292 mm) wide on a 15″ wheel. Converted directly it reads 290/75R15; the nearest standard metric size is 285/75R15.
Your tire size
e.g. 235/75R15, 33X12.50R15, or 225/45R17 91V
Metric equivalents of 32X11.50R15
No standard metric size lands exactly on 32X11.50R15. The best compromise is 285/75R15 (−0.5% height, −7 mm width); the list is ranked by height and width together, all on a 15″ wheel within ±3%.
| Size | Diameter | Height vs 32X11.50R15 | Width vs 32X11.50R15 |
|---|---|---|---|
| 285/75R15 | 31.8″ · 808 mm | −0.5% | −7 mm |
| 295/75R15 | 32.4″ · 824 mm | +1.3% | +3 mm |
| 305/70R15 | 31.8″ · 808 mm | −0.6% | +13 mm |
| 295/70R15 | 31.3″ · 794 mm | −2.3% | +3 mm |
| 275/80R15 | 32.3″ · 821 mm | +1.0% | −17 mm |
32X11.50R15 dimensions
Computed from the size code; moulded tires vary by brand by roughly 1–3%.
| Dimension | Inches | Millimetres |
|---|---|---|
| Overall diameter | 32.0″ | 813 |
| Section width | 11.50″ | 292 |
| Sidewall height | 8.50″ | 216 |
| Circumference | 100.5″ | 2553 |
| Revolutions per mile | 630 | — |
| Revolutions per km | — | 392 |
The same height on other wheels
If you are changing wheel diameter but want to keep a 32.0″ overall height, these metric sizes come closest (within 2%).
| Wheel | Size | Diameter | Difference |
|---|---|---|---|
| 16″ | 315/65R16 | 32.1″ | +0.4% |
| 17″ | 295/65R17 | 32.1″ | +0.3% |
| 18″ | 295/60R18 | 31.9″ | −0.2% |
| 20″ | 305/50R20 | 32.0″ | +0.0% |
| 22″ | 265/50R22 | 32.4″ | +1.4% |
Wheel width and neighbouring sizes
A 292 mm-wide tire mounts on 8.5–11.0″ wide wheels (the usual approved range; the middle is ideal).
One step down is 31X10.50R15: −3.1% in diameter. With a speedometer calibrated for 32X11.50R15, an indicated 60 mph would be 58.1 mph on 31X10.50R15.
One step up is 33X10.50R15: +3.1% in diameter. With a speedometer calibrated for 32X11.50R15, an indicated 60 mph would be 61.9 mph on 33X10.50R15.
Figures are geometric: overall diameter = wheel + 2 × sidewall, 25.4 mm per inch. Check the tire maker's data sheet for the exact moulded size before buying.