35x12.50R18 in metric
| Measure | Inches | Millimetres |
|---|---|---|
| Overall height | 35.00 in | 889 mm |
| Width | 12.50 in | 318 mm |
| Sidewall | 8.50 in | 216 mm |
| Wheel | 18 in | 457 mm |
| Revs per mile | 576.2 |
Flotation sizes are written as height × width R wheel in inches, so 35x12.50R18 is 35 in tall and 12.50 in wide by definition. Metric sizes are written in millimetres, so there is no exact twin: these are the closest calculated metric sizes on a 18 in wheel.
Closest calculated metric sizes
| Size | Height | Off by | Width |
|---|---|---|---|
| 335/65R18 (compare) | 35.1 in | +0.15 in | 13.2 in |
| 305/70R18 (compare) | 34.8 in | −0.19 in | 12.0 in |
| 315/70R18 (compare) | 35.4 in | +0.36 in | 12.4 in |
| 325/65R18 (compare) | 34.6 in | −0.37 in | 12.8 in |
| 295/75R18 (compare) | 35.4 in | +0.42 in | 11.6 in |
These are calculated combinations of standard widths and aspect ratios, not a list of tires that are sold: confirm a tire is made in that size, and that it suits your wheel width.
Moving up to 35x12.50R18 from a smaller tire
| From | Height change | 60 mph on the speedometer is really | Verdict |
|---|---|---|---|
| 275/65R20 | +2.7% (+0.93 in) | 61.6 mph | Close match |
| 285/75R17 | +3.5% (+1.17 in) | 62.1 mph | Check clearance |
| 285/60R20 | +4.6% (+1.54 in) | 62.8 mph | Check clearance |
Regearing
A tire this size is taller than most stock tires, so engine RPM falls at a given speed. See the gear ratio calculator and the regear chart.
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.