Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/90-16 | 145/60-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.28 (667.4) | 27.85 (707.4) | 1.57 (40) 6% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 82.55 (2096.7) | 87.49 (2222.36) | 4.95 (125.66) 6% |
| Sidewall Height inches (mm) | 5.14 (130.5) | 3.43 (87) | -1.71 (-43.5) -33.3% |
| Revolutions per mile (km) | 767.56 (476.94) | 724.16 (449.97) | -43.4 (-26.97) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.12 km/h) |
| 25 mph (40.23 km/h) | 26.5 mph (42.65 km/h) |
| 30 mph (48.28 km/h) | 31.8 mph (51.17 km/h) |
| 35 mph (56.33 km/h) | 37.1 mph (59.7 km/h) |
| 40 mph (64.37 km/h) | 42.4 mph (68.23 km/h) |
| 45 mph (72.42 km/h) | 47.7 mph (76.76 km/h) |
| 50 mph (80.47 km/h) | 53 mph (85.29 km/h) |
| 55 mph (88.51 km/h) | 58.3 mph (93.82 km/h) |
| 60 mph (96.56 km/h) | 63.6 mph (102.35 km/h) |
| 65 mph (104.61 km/h) | 68.9 mph (110.88 km/h) |
| 70 mph (112.65 km/h) | 74.2 mph (119.41 km/h) |
| 75 mph (120.7 km/h) | 79.5 mph (127.94 km/h) |
| 80 mph (128.75 km/h) | 84.79 mph (136.46 km/h) |
| 85 mph (136.79 km/h) | 90.09 mph (144.99 km/h) |
| 90 mph (144.84 km/h) | 95.39 mph (153.52 km/h) |
| 95 mph (152.89 km/h) | 100.69 mph (162.05 km/h) |
| 100 mph (160.93 km/h) | 105.99 mph (170.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1843 | 2141 | 2306 | 2407 | 2517 | 2596 | 2682 | 2784 | 2925 | 3066 | 3223 | 3348 | 3576 | 3827 | 4023 | 4148 | 4219 | 4478 | 4838 | 5623 |
Better Fuel Economy Factory Ratios Increased Power
