Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-20 | 315/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.2 (691) | 28.68 (728.5) | 1.48 (37.5) 5.4% |
| Width inches (mm) | 12.01 (305) | 12.4 (315) | 0.39 (10) 3.3% |
| Circum. inches (mm) | 85.47 (2170.84) | 90.1 (2288.65) | 4.64 (117.81) 5.4% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 4.34 (110.25) | 0.74 (18.75) 20.5% |
| Revolutions per mile (km) | 741.35 (460.65) | 703.18 (436.94) | -38.16 (-23.71) -5.1% |
315/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.09 mph (33.93 km/h) |
| 25 mph (40.23 km/h) | 26.36 mph (42.42 km/h) |
| 30 mph (48.28 km/h) | 31.63 mph (50.9 km/h) |
| 35 mph (56.33 km/h) | 36.9 mph (59.38 km/h) |
| 40 mph (64.37 km/h) | 42.17 mph (67.87 km/h) |
| 45 mph (72.42 km/h) | 47.44 mph (76.35 km/h) |
| 50 mph (80.47 km/h) | 52.71 mph (84.83 km/h) |
| 55 mph (88.51 km/h) | 57.98 mph (93.32 km/h) |
| 60 mph (96.56 km/h) | 63.26 mph (101.8 km/h) |
| 65 mph (104.61 km/h) | 68.53 mph (110.28 km/h) |
| 70 mph (112.65 km/h) | 73.8 mph (118.77 km/h) |
| 75 mph (120.7 km/h) | 79.07 mph (127.25 km/h) |
| 80 mph (128.75 km/h) | 84.34 mph (135.73 km/h) |
| 85 mph (136.79 km/h) | 89.61 mph (144.22 km/h) |
| 90 mph (144.84 km/h) | 94.88 mph (152.7 km/h) |
| 95 mph (152.89 km/h) | 100.16 mph (161.19 km/h) |
| 100 mph (160.93 km/h) | 105.43 mph (169.67 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
