Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 266/76-15 | 381/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.92 (785.32) | 30 (762) | -0.92 (-23.32) -3% |
| Width inches (mm) | 10.47 (266) | 15 (381) | 4.53 (115) 43.2% |
| Circum. inches (mm) | 97.13 (2467.16) | 94.25 (2393.89) | -2.88 (-73.26) -3% |
| Sidewall Height inches (mm) | 7.96 (202.16) | 7.5 (190.5) | -0.46 (-11.66) -5.8% |
| Revolutions per mile (km) | 652.31 (405.32) | 672.27 (417.73) | 19.96 (12.4) 3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.41 mph (31.23 km/h) |
| 25 mph (40.23 km/h) | 24.26 mph (39.04 km/h) |
| 30 mph (48.28 km/h) | 29.11 mph (46.85 km/h) |
| 35 mph (56.33 km/h) | 33.96 mph (54.65 km/h) |
| 40 mph (64.37 km/h) | 38.81 mph (62.46 km/h) |
| 45 mph (72.42 km/h) | 43.66 mph (70.27 km/h) |
| 50 mph (80.47 km/h) | 48.52 mph (78.08 km/h) |
| 55 mph (88.51 km/h) | 53.37 mph (85.89 km/h) |
| 60 mph (96.56 km/h) | 58.22 mph (93.69 km/h) |
| 65 mph (104.61 km/h) | 63.07 mph (101.5 km/h) |
| 70 mph (112.65 km/h) | 67.92 mph (109.31 km/h) |
| 75 mph (120.7 km/h) | 72.77 mph (117.12 km/h) |
| 80 mph (128.75 km/h) | 77.62 mph (124.92 km/h) |
| 85 mph (136.79 km/h) | 82.48 mph (132.73 km/h) |
| 90 mph (144.84 km/h) | 87.33 mph (140.54 km/h) |
| 95 mph (152.89 km/h) | 92.18 mph (148.35 km/h) |
| 100 mph (160.93 km/h) | 97.03 mph (156.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1987 | 2140 | 2235 | 2337 | 2410 | 2490 | 2584 | 2715 | 2846 | 2992 | 3109 | 3320 | 3553 | 3735 | 3851 | 3917 | 4157 | 4492 | 5220 |
Better Fuel Economy Factory Ratios Increased Power
