Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/50-17 | 315/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.28 (616.8) | 28.68 (728.5) | 4.4 (111.7) 18.1% |
| Width inches (mm) | 7.28 (185) | 12.4 (315) | 5.12 (130) 70.3% |
| Circum. inches (mm) | 76.29 (1937.73) | 90.1 (2288.65) | 13.82 (350.92) 18.1% |
| Sidewall Height inches (mm) | 3.64 (92.5) | 4.34 (110.25) | 0.7 (17.75) 19.2% |
| Revolutions per mile (km) | 830.53 (516.07) | 703.18 (436.94) | -127.34 (-79.13) -15.3% |
315/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.62 mph (38.02 km/h) |
| 25 mph (40.23 km/h) | 29.53 mph (47.52 km/h) |
| 30 mph (48.28 km/h) | 35.43 mph (57.02 km/h) |
| 35 mph (56.33 km/h) | 41.34 mph (66.53 km/h) |
| 40 mph (64.37 km/h) | 47.24 mph (76.03 km/h) |
| 45 mph (72.42 km/h) | 53.15 mph (85.54 km/h) |
| 50 mph (80.47 km/h) | 59.05 mph (95.04 km/h) |
| 55 mph (88.51 km/h) | 64.96 mph (104.54 km/h) |
| 60 mph (96.56 km/h) | 70.87 mph (114.05 km/h) |
| 65 mph (104.61 km/h) | 76.77 mph (123.55 km/h) |
| 70 mph (112.65 km/h) | 82.68 mph (133.06 km/h) |
| 75 mph (120.7 km/h) | 88.58 mph (142.56 km/h) |
| 80 mph (128.75 km/h) | 94.49 mph (152.06 km/h) |
| 85 mph (136.79 km/h) | 100.39 mph (161.57 km/h) |
| 90 mph (144.84 km/h) | 106.3 mph (171.07 km/h) |
| 95 mph (152.89 km/h) | 112.2 mph (180.58 km/h) |
| 100 mph (160.93 km/h) | 118.11 mph (190.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1789 | 2079 | 2239 | 2338 | 2444 | 2520 | 2604 | 2703 | 2840 | 2977 | 3130 | 3252 | 3472 | 3716 | 3906 | 4028 | 4097 | 4348 | 4698 | 5460 |
Better Fuel Economy Factory Ratios Increased Power
