Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 165/99-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 30.86 (783.9) | 4.36 (110.7) 16.4% |
| Width inches (mm) | 5.31 (135) | 6.5 (165) | 1.18 (30) 22.2% |
| Circum. inches (mm) | 83.26 (2114.92) | 96.96 (2462.69) | 13.69 (347.77) 16.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 6.43 (163.35) | 2.18 (55.35) 51.3% |
| Revolutions per mile (km) | 760.95 (472.83) | 653.49 (406.06) | -107.46 (-66.77) -14.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.29 mph (37.48 km/h) |
| 25 mph (40.23 km/h) | 29.11 mph (46.85 km/h) |
| 30 mph (48.28 km/h) | 34.93 mph (56.22 km/h) |
| 35 mph (56.33 km/h) | 40.76 mph (65.59 km/h) |
| 40 mph (64.37 km/h) | 46.58 mph (74.96 km/h) |
| 45 mph (72.42 km/h) | 52.4 mph (84.33 km/h) |
| 50 mph (80.47 km/h) | 58.22 mph (93.7 km/h) |
| 55 mph (88.51 km/h) | 64.04 mph (103.07 km/h) |
| 60 mph (96.56 km/h) | 69.87 mph (112.44 km/h) |
| 65 mph (104.61 km/h) | 75.69 mph (121.81 km/h) |
| 70 mph (112.65 km/h) | 81.51 mph (131.18 km/h) |
| 75 mph (120.7 km/h) | 87.33 mph (140.55 km/h) |
| 80 mph (128.75 km/h) | 93.16 mph (149.92 km/h) |
| 85 mph (136.79 km/h) | 98.98 mph (159.29 km/h) |
| 90 mph (144.84 km/h) | 104.8 mph (168.66 km/h) |
| 95 mph (152.89 km/h) | 110.62 mph (178.03 km/h) |
| 100 mph (160.93 km/h) | 116.44 mph (187.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1663 | 1932 | 2081 | 2173 | 2272 | 2342 | 2420 | 2512 | 2640 | 2767 | 2908 | 3022 | 3227 | 3453 | 3630 | 3744 | 3807 | 4041 | 4366 | 5074 |
Better Fuel Economy Factory Ratios Increased Power
