Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 145/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 25.99 (660.2) | 0.55 (14) 2.2% |
| Width inches (mm) | 5.31 (135) | 5.71 (145) | 0.39 (10) 7.4% |
| Circum. inches (mm) | 79.93 (2030.1) | 81.66 (2074.08) | 1.73 (43.98) 2.2% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4 (101.5) | 0.28 (7) 7.4% |
| Revolutions per mile (km) | 792.74 (492.59) | 775.93 (482.14) | -16.81 (-10.45) -2.1% |
145/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.43 mph (32.88 km/h) |
| 25 mph (40.23 km/h) | 25.54 mph (41.11 km/h) |
| 30 mph (48.28 km/h) | 30.65 mph (49.33 km/h) |
| 35 mph (56.33 km/h) | 35.76 mph (57.55 km/h) |
| 40 mph (64.37 km/h) | 40.87 mph (65.77 km/h) |
| 45 mph (72.42 km/h) | 45.97 mph (73.99 km/h) |
| 50 mph (80.47 km/h) | 51.08 mph (82.21 km/h) |
| 55 mph (88.51 km/h) | 56.19 mph (90.43 km/h) |
| 60 mph (96.56 km/h) | 61.3 mph (98.65 km/h) |
| 65 mph (104.61 km/h) | 66.41 mph (106.87 km/h) |
| 70 mph (112.65 km/h) | 71.52 mph (115.09 km/h) |
| 75 mph (120.7 km/h) | 76.62 mph (123.32 km/h) |
| 80 mph (128.75 km/h) | 81.73 mph (131.54 km/h) |
| 85 mph (136.79 km/h) | 86.84 mph (139.76 km/h) |
| 90 mph (144.84 km/h) | 91.95 mph (147.98 km/h) |
| 95 mph (152.89 km/h) | 97.06 mph (156.2 km/h) |
| 100 mph (160.93 km/h) | 102.17 mph (164.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975 | 2294 | 2470 | 2580 | 2697 | 2781 | 2874 | 2983 | 3134 | 3285 | 3453 | 3588 | 3832 | 4100 | 4311 | 4445 | 4521 | 4798 | 5184 | 6025 |
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