Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 155/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 26.54 (674.2) | 1.1 (28) 4.3% |
| Width inches (mm) | 5.31 (135) | 6.1 (155) | 0.79 (20) 14.8% |
| Circum. inches (mm) | 79.93 (2030.1) | 83.39 (2118.06) | 3.46 (87.96) 4.3% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.27 (108.5) | 0.55 (14) 14.8% |
| Revolutions per mile (km) | 792.74 (492.59) | 759.82 (472.13) | -32.92 (-20.46) -4.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.87 mph (33.58 km/h) |
| 25 mph (40.23 km/h) | 26.08 mph (41.98 km/h) |
| 30 mph (48.28 km/h) | 31.3 mph (50.37 km/h) |
| 35 mph (56.33 km/h) | 36.52 mph (58.77 km/h) |
| 40 mph (64.37 km/h) | 41.73 mph (67.16 km/h) |
| 45 mph (72.42 km/h) | 46.95 mph (75.56 km/h) |
| 50 mph (80.47 km/h) | 52.17 mph (83.95 km/h) |
| 55 mph (88.51 km/h) | 57.38 mph (92.35 km/h) |
| 60 mph (96.56 km/h) | 62.6 mph (100.74 km/h) |
| 65 mph (104.61 km/h) | 67.82 mph (109.14 km/h) |
| 70 mph (112.65 km/h) | 73.03 mph (117.54 km/h) |
| 75 mph (120.7 km/h) | 78.25 mph (125.93 km/h) |
| 80 mph (128.75 km/h) | 83.47 mph (134.33 km/h) |
| 85 mph (136.79 km/h) | 88.68 mph (142.72 km/h) |
| 90 mph (144.84 km/h) | 93.9 mph (151.12 km/h) |
| 95 mph (152.89 km/h) | 99.12 mph (159.51 km/h) |
| 100 mph (160.93 km/h) | 104.33 mph (167.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1934 | 2246 | 2419 | 2526 | 2641 | 2723 | 2814 | 2921 | 3069 | 3217 | 3382 | 3513 | 3752 | 4015 | 4221 | 4353 | 4427 | 4698 | 5077 | 5900 |
Better Fuel Economy Factory Ratios Increased Power
