Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/90-16 | 31/8.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.28 (667.4) | 30.97 (786.56) | 4.69 (119.16) 17.9% |
| Width inches (mm) | 5.71 (145) | 8.5 (216) | 2.8 (71) 49% |
| Circum. inches (mm) | 82.55 (2096.7) | 97.29 (2471.05) | 14.74 (374.35) 17.9% |
| Sidewall Height inches (mm) | 5.14 (130.5) | 7.48 (190.08) | 2.35 (59.58) 45.7% |
| Revolutions per mile (km) | 767.56 (476.94) | 651.28 (404.69) | -116.28 (-72.25) -15.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.57 mph (37.93 km/h) |
| 25 mph (40.23 km/h) | 29.46 mph (47.42 km/h) |
| 30 mph (48.28 km/h) | 35.36 mph (56.9 km/h) |
| 35 mph (56.33 km/h) | 41.25 mph (66.38 km/h) |
| 40 mph (64.37 km/h) | 47.14 mph (75.87 km/h) |
| 45 mph (72.42 km/h) | 53.03 mph (85.35 km/h) |
| 50 mph (80.47 km/h) | 58.93 mph (94.83 km/h) |
| 55 mph (88.51 km/h) | 64.82 mph (104.32 km/h) |
| 60 mph (96.56 km/h) | 70.71 mph (113.8 km/h) |
| 65 mph (104.61 km/h) | 76.61 mph (123.28 km/h) |
| 70 mph (112.65 km/h) | 82.5 mph (132.77 km/h) |
| 75 mph (120.7 km/h) | 88.39 mph (142.25 km/h) |
| 80 mph (128.75 km/h) | 94.28 mph (151.73 km/h) |
| 85 mph (136.79 km/h) | 100.18 mph (161.22 km/h) |
| 90 mph (144.84 km/h) | 106.07 mph (170.7 km/h) |
| 95 mph (152.89 km/h) | 111.96 mph (180.19 km/h) |
| 100 mph (160.93 km/h) | 117.85 mph (189.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1657 | 1925 | 2073 | 2165 | 2264 | 2334 | 2412 | 2504 | 2631 | 2758 | 2899 | 3011 | 3216 | 3442 | 3618 | 3731 | 3794 | 4027 | 4352 | 5057 |
Better Fuel Economy Factory Ratios Increased Power
