Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 190/70-15 | 27/8.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.47 (647) | 27.08 (687.72) | 1.6 (40.72) 6.3% |
| Width inches (mm) | 7.48 (190) | 8.5 (216) | 1.02 (26) 13.7% |
| Circum. inches (mm) | 80.02 (2032.61) | 85.06 (2160.54) | 5.04 (127.93) 6.3% |
| Sidewall Height inches (mm) | 5.24 (133) | 6.04 (153.36) | 0.8 (20.36) 15.3% |
| Revolutions per mile (km) | 791.76 (491.98) | 744.88 (462.85) | -46.88 (-29.13) -5.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.26 mph (34.21 km/h) |
| 25 mph (40.23 km/h) | 26.57 mph (42.77 km/h) |
| 30 mph (48.28 km/h) | 31.89 mph (51.32 km/h) |
| 35 mph (56.33 km/h) | 37.2 mph (59.87 km/h) |
| 40 mph (64.37 km/h) | 42.52 mph (68.43 km/h) |
| 45 mph (72.42 km/h) | 47.83 mph (76.98 km/h) |
| 50 mph (80.47 km/h) | 53.15 mph (85.53 km/h) |
| 55 mph (88.51 km/h) | 58.46 mph (94.08 km/h) |
| 60 mph (96.56 km/h) | 63.78 mph (102.64 km/h) |
| 65 mph (104.61 km/h) | 69.09 mph (111.19 km/h) |
| 70 mph (112.65 km/h) | 74.41 mph (119.74 km/h) |
| 75 mph (120.7 km/h) | 79.72 mph (128.3 km/h) |
| 80 mph (128.75 km/h) | 85.03 mph (136.85 km/h) |
| 85 mph (136.79 km/h) | 90.35 mph (145.4 km/h) |
| 90 mph (144.84 km/h) | 95.66 mph (153.96 km/h) |
| 95 mph (152.89 km/h) | 100.98 mph (162.51 km/h) |
| 100 mph (160.93 km/h) | 106.29 mph (171.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1896 | 2202 | 2371 | 2476 | 2589 | 2670 | 2759 | 2864 | 3009 | 3154 | 3315 | 3444 | 3678 | 3936 | 4138 | 4267 | 4340 | 4606 | 4977 | 5784 |
Better Fuel Economy Factory Ratios Increased Power
