Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 175/90-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 24.4 (619.8) | 2.76 (70) 12.7% |
| Width inches (mm) | 6.89 (175) | 6.89 (175) | 0 (0) 0% |
| Circum. inches (mm) | 68 (1727.25) | 76.66 (1947.16) | 8.66 (219.91) 12.7% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 6.2 (157.5) | 1.38 (35) 28.6% |
| Revolutions per mile (km) | 931.74 (578.95) | 826.51 (513.57) | -105.23 (-65.39) -11.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.55 mph (36.28 km/h) |
| 25 mph (40.23 km/h) | 28.18 mph (45.36 km/h) |
| 30 mph (48.28 km/h) | 33.82 mph (54.43 km/h) |
| 35 mph (56.33 km/h) | 39.46 mph (63.5 km/h) |
| 40 mph (64.37 km/h) | 45.09 mph (72.57 km/h) |
| 45 mph (72.42 km/h) | 50.73 mph (81.64 km/h) |
| 50 mph (80.47 km/h) | 56.37 mph (90.71 km/h) |
| 55 mph (88.51 km/h) | 62 mph (99.78 km/h) |
| 60 mph (96.56 km/h) | 67.64 mph (108.85 km/h) |
| 65 mph (104.61 km/h) | 73.28 mph (117.93 km/h) |
| 70 mph (112.65 km/h) | 78.91 mph (127 km/h) |
| 75 mph (120.7 km/h) | 84.55 mph (136.07 km/h) |
| 80 mph (128.75 km/h) | 90.19 mph (145.14 km/h) |
| 85 mph (136.79 km/h) | 95.82 mph (154.21 km/h) |
| 90 mph (144.84 km/h) | 101.46 mph (163.28 km/h) |
| 95 mph (152.89 km/h) | 107.1 mph (172.35 km/h) |
| 100 mph (160.93 km/h) | 112.73 mph (181.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2103 | 2443 | 2631 | 2748 | 2873 | 2963 | 3061 | 3177 | 3338 | 3500 | 3679 | 3822 | 4081 | 4368 | 4591 | 4735 | 4815 | 5111 | 5522 | 6417 |
Better Fuel Economy Factory Ratios Increased Power
