Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-17 | 125/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.57 (674.8) | 25.87 (657.2) | -0.69 (-17.6) -2.6% |
| Width inches (mm) | 5.31 (135) | 4.92 (125) | -0.39 (-10) -7.4% |
| Circum. inches (mm) | 83.46 (2119.95) | 81.29 (2064.65) | -2.18 (-55.29) -2.6% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 3.94 (100) | -0.85 (-21.5) -17.7% |
| Revolutions per mile (km) | 759.14 (471.71) | 779.47 (484.34) | 20.33 (12.63) 2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.48 mph (31.35 km/h) |
| 25 mph (40.23 km/h) | 24.35 mph (39.18 km/h) |
| 30 mph (48.28 km/h) | 29.22 mph (47.02 km/h) |
| 35 mph (56.33 km/h) | 34.09 mph (54.86 km/h) |
| 40 mph (64.37 km/h) | 38.96 mph (62.69 km/h) |
| 45 mph (72.42 km/h) | 43.83 mph (70.53 km/h) |
| 50 mph (80.47 km/h) | 48.7 mph (78.37 km/h) |
| 55 mph (88.51 km/h) | 53.57 mph (86.21 km/h) |
| 60 mph (96.56 km/h) | 58.44 mph (94.04 km/h) |
| 65 mph (104.61 km/h) | 63.3 mph (101.88 km/h) |
| 70 mph (112.65 km/h) | 68.17 mph (109.72 km/h) |
| 75 mph (120.7 km/h) | 73.04 mph (117.55 km/h) |
| 80 mph (128.75 km/h) | 77.91 mph (125.39 km/h) |
| 85 mph (136.79 km/h) | 82.78 mph (133.23 km/h) |
| 90 mph (144.84 km/h) | 87.65 mph (141.06 km/h) |
| 95 mph (152.89 km/h) | 92.52 mph (148.9 km/h) |
| 100 mph (160.93 km/h) | 97.39 mph (156.74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 2304 | 2482 | 2591 | 2710 | 2794 | 2887 | 2997 | 3148 | 3300 | 3469 | 3604 | 3849 | 4119 | 4330 | 4465 | 4541 | 4820 | 5208 | 6052 |
Better Fuel Economy Factory Ratios Increased Power
