Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/80-15 | 34/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.24 (565) | 34.03 (864.36) | 11.79 (299.36) 53% |
| Width inches (mm) | 4.53 (115) | 12.52 (318) | 7.99 (203) 176.5% |
| Circum. inches (mm) | 69.88 (1775) | 106.91 (2715.47) | 37.03 (940.47) 53% |
| Sidewall Height inches (mm) | 3.62 (92) | 9.51 (241.68) | 5.89 (149.68) 162.7% |
| Revolutions per mile (km) | 906.67 (563.38) | 592.66 (368.26) | -314.01 (-195.12) -34.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.6 mph (49.24 km/h) |
| 25 mph (40.23 km/h) | 38.25 mph (61.55 km/h) |
| 30 mph (48.28 km/h) | 45.9 mph (73.86 km/h) |
| 35 mph (56.33 km/h) | 53.54 mph (86.17 km/h) |
| 40 mph (64.37 km/h) | 61.19 mph (98.48 km/h) |
| 45 mph (72.42 km/h) | 68.84 mph (110.79 km/h) |
| 50 mph (80.47 km/h) | 76.49 mph (123.1 km/h) |
| 55 mph (88.51 km/h) | 84.14 mph (135.41 km/h) |
| 60 mph (96.56 km/h) | 91.79 mph (147.72 km/h) |
| 65 mph (104.61 km/h) | 99.44 mph (160.03 km/h) |
| 70 mph (112.65 km/h) | 107.09 mph (172.34 km/h) |
| 75 mph (120.7 km/h) | 114.74 mph (184.65 km/h) |
| 80 mph (128.75 km/h) | 122.39 mph (196.96 km/h) |
| 85 mph (136.79 km/h) | 130.04 mph (209.27 km/h) |
| 90 mph (144.84 km/h) | 137.69 mph (221.58 km/h) |
| 95 mph (152.89 km/h) | 145.33 mph (233.89 km/h) |
| 100 mph (160.93 km/h) | 152.98 mph (246.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1508 | 1752 | 1887 | 1970 | 2060 | 2124 | 2195 | 2278 | 2394 | 2509 | 2638 | 2740 | 2927 | 3132 | 3292 | 3395 | 3453 | 3665 | 3960 | 4602 |
Better Fuel Economy Factory Ratios Increased Power
