Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 235/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 24.03 (610.3) | 2.38 (60.5) 11% |
| Width inches (mm) | 6.89 (175) | 9.25 (235) | 2.36 (60) 34.3% |
| Circum. inches (mm) | 68 (1727.25) | 75.48 (1917.31) | 7.48 (190.07) 11% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 6.01 (152.75) | 1.19 (30.25) 24.7% |
| Revolutions per mile (km) | 931.74 (578.95) | 839.37 (521.56) | -92.36 (-57.39) -9.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.2 mph (35.73 km/h) |
| 25 mph (40.23 km/h) | 27.75 mph (44.66 km/h) |
| 30 mph (48.28 km/h) | 33.3 mph (53.59 km/h) |
| 35 mph (56.33 km/h) | 38.85 mph (62.53 km/h) |
| 40 mph (64.37 km/h) | 44.4 mph (71.46 km/h) |
| 45 mph (72.42 km/h) | 49.95 mph (80.39 km/h) |
| 50 mph (80.47 km/h) | 55.5 mph (89.32 km/h) |
| 55 mph (88.51 km/h) | 61.05 mph (98.25 km/h) |
| 60 mph (96.56 km/h) | 66.6 mph (107.19 km/h) |
| 65 mph (104.61 km/h) | 72.15 mph (116.12 km/h) |
| 70 mph (112.65 km/h) | 77.7 mph (125.05 km/h) |
| 75 mph (120.7 km/h) | 83.25 mph (133.98 km/h) |
| 80 mph (128.75 km/h) | 88.8 mph (142.92 km/h) |
| 85 mph (136.79 km/h) | 94.35 mph (151.85 km/h) |
| 90 mph (144.84 km/h) | 99.9 mph (160.78 km/h) |
| 95 mph (152.89 km/h) | 105.45 mph (169.71 km/h) |
| 100 mph (160.93 km/h) | 111 mph (178.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2136 | 2481 | 2672 | 2790 | 2918 | 3009 | 3109 | 3227 | 3390 | 3554 | 3736 | 3881 | 4145 | 4436 | 4663 | 4808 | 4890 | 5190 | 5608 | 6517 |
Better Fuel Economy Factory Ratios Increased Power
