Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/85-14 | 30/10-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.39 (721.1) | 30 (762) | 1.61 (40.9) 5.7% |
| Width inches (mm) | 8.46 (215) | 10 (254) | 1.54 (39) 18.1% |
| Circum. inches (mm) | 89.19 (2265.4) | 94.25 (2393.89) | 5.06 (128.49) 5.7% |
| Sidewall Height inches (mm) | 7.19 (182.75) | 8 (203.2) | 0.81 (20.45) 11.2% |
| Revolutions per mile (km) | 710.4 (441.42) | 672.27 (417.73) | -38.13 (-23.69) -5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.13 mph (34.01 km/h) |
| 25 mph (40.23 km/h) | 26.42 mph (42.52 km/h) |
| 30 mph (48.28 km/h) | 31.7 mph (51.02 km/h) |
| 35 mph (56.33 km/h) | 36.99 mph (59.52 km/h) |
| 40 mph (64.37 km/h) | 42.27 mph (68.03 km/h) |
| 45 mph (72.42 km/h) | 47.55 mph (76.53 km/h) |
| 50 mph (80.47 km/h) | 52.84 mph (85.03 km/h) |
| 55 mph (88.51 km/h) | 58.12 mph (93.53 km/h) |
| 60 mph (96.56 km/h) | 63.4 mph (102.04 km/h) |
| 65 mph (104.61 km/h) | 68.69 mph (110.54 km/h) |
| 70 mph (112.65 km/h) | 73.97 mph (119.04 km/h) |
| 75 mph (120.7 km/h) | 79.25 mph (127.55 km/h) |
| 80 mph (128.75 km/h) | 84.54 mph (136.05 km/h) |
| 85 mph (136.79 km/h) | 89.82 mph (144.55 km/h) |
| 90 mph (144.84 km/h) | 95.1 mph (153.06 km/h) |
| 95 mph (152.89 km/h) | 100.39 mph (161.56 km/h) |
| 100 mph (160.93 km/h) | 105.67 mph (170.06 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1987 | 2140 | 2235 | 2337 | 2410 | 2490 | 2584 | 2715 | 2846 | 2992 | 3109 | 3320 | 3553 | 3735 | 3851 | 3917 | 4157 | 4492 | 5220 |
Better Fuel Economy Factory Ratios Increased Power
