Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-15 | 180/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.5 (597) | 24.92 (633) | 1.42 (36) 6% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 73.84 (1875.53) | 78.29 (1988.63) | 4.45 (113.1) 6% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.96 (126) | 0.71 (18) 16.7% |
| Revolutions per mile (km) | 858.07 (533.18) | 809.27 (502.86) | -48.8 (-30.32) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.21 mph (34.13 km/h) |
| 25 mph (40.23 km/h) | 26.51 mph (42.66 km/h) |
| 30 mph (48.28 km/h) | 31.81 mph (51.19 km/h) |
| 35 mph (56.33 km/h) | 37.11 mph (59.72 km/h) |
| 40 mph (64.37 km/h) | 42.41 mph (68.26 km/h) |
| 45 mph (72.42 km/h) | 47.71 mph (76.79 km/h) |
| 50 mph (80.47 km/h) | 53.02 mph (85.32 km/h) |
| 55 mph (88.51 km/h) | 58.32 mph (93.85 km/h) |
| 60 mph (96.56 km/h) | 63.62 mph (102.38 km/h) |
| 65 mph (104.61 km/h) | 68.92 mph (110.92 km/h) |
| 70 mph (112.65 km/h) | 74.22 mph (119.45 km/h) |
| 75 mph (120.7 km/h) | 79.52 mph (127.98 km/h) |
| 80 mph (128.75 km/h) | 84.82 mph (136.51 km/h) |
| 85 mph (136.79 km/h) | 90.13 mph (145.04 km/h) |
| 90 mph (144.84 km/h) | 95.43 mph (153.58 km/h) |
| 95 mph (152.89 km/h) | 100.73 mph (162.11 km/h) |
| 100 mph (160.93 km/h) | 106.03 mph (170.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2059 | 2392 | 2576 | 2690 | 2813 | 2901 | 2997 | 3111 | 3269 | 3427 | 3602 | 3742 | 3996 | 4277 | 4496 | 4636 | 4715 | 5004 | 5407 | 6284 |
Better Fuel Economy Factory Ratios Increased Power
