ElpiAuto35X12.50R15 in metric
A 35X12.50R15 is 35.0″ (889 mm) tall and 12.50″ (318 mm) wide on a 15″ wheel. Converted directly it reads 320/80R15; the nearest standard metric size is 315/80R15.
Your tire size
e.g. 235/75R15, 33X12.50R15, or 225/45R17 91V
Metric equivalents of 35X12.50R15
315/80R15 is a near-exact match: −0.4% in height and −3 mm in width. The others trade a little height for width, or the reverse — all on the same 15″ wheel, within the ±3% most makers accept.
| Size | Diameter | Height vs 35X12.50R15 | Width vs 35X12.50R15 |
|---|---|---|---|
| 315/80R15 | 34.8″ · 885 mm | −0.4% | −3 mm |
| 325/80R15 | 35.5″ · 901 mm | +1.3% | +8 mm |
| 335/75R15 | 34.8″ · 883 mm | −0.6% | +18 mm |
| 305/85R15 | 35.4″ · 900 mm | +1.2% | −13 mm |
| 295/85R15 | 34.7″ · 883 mm | −0.7% | −23 mm |
35X12.50R15 dimensions
Computed from the size code; moulded tires vary by brand by roughly 1–3%.
| Dimension | Inches | Millimetres |
|---|---|---|
| Overall diameter | 35.0″ | 889 |
| Section width | 12.50″ | 318 |
| Sidewall height | 10.00″ | 254 |
| Circumference | 110.0″ | 2793 |
| Revolutions per mile | 576 | — |
| Revolutions per km | — | 358 |
The same height on other wheels
If you are changing wheel diameter but want to keep a 35.0″ overall height, these metric sizes come closest (within 2%).
| Wheel | Size | Diameter | Difference |
|---|---|---|---|
| 16″ | 345/70R16 | 35.0″ | +0.0% |
| 17″ | 305/75R17 | 35.0″ | +0.0% |
| 18″ | 335/65R18 | 35.1″ | +0.4% |
| 20″ | 345/55R20 | 34.9″ | −0.2% |
| 22″ | 335/50R22 | 35.2″ | +0.5% |
Wheel width and neighbouring sizes
A 318 mm-wide tire mounts on 9.5–12.0″ wide wheels (the usual approved range; the middle is ideal).
One step down is 33X10.50R15: −5.7% in diameter. With a speedometer calibrated for 35X12.50R15, an indicated 60 mph would be 56.6 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.