Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-21 | 315/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.74 (780.9) | 28.68 (728.5) | -2.06 (-52.4) -6.7% |
| Width inches (mm) | 10.83 (275) | 12.4 (315) | 1.57 (40) 14.5% |
| Circum. inches (mm) | 96.59 (2453.27) | 90.1 (2288.65) | -6.48 (-164.62) -6.7% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.34 (110.25) | -0.53 (-13.5) -10.9% |
| Revolutions per mile (km) | 656 (407.62) | 703.18 (436.94) | 47.19 (29.32) 7.2% |
315/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.66 mph (30.03 km/h) |
| 25 mph (40.23 km/h) | 23.32 mph (37.53 km/h) |
| 30 mph (48.28 km/h) | 27.99 mph (45.04 km/h) |
| 35 mph (56.33 km/h) | 32.65 mph (52.55 km/h) |
| 40 mph (64.37 km/h) | 37.32 mph (60.05 km/h) |
| 45 mph (72.42 km/h) | 41.98 mph (67.56 km/h) |
| 50 mph (80.47 km/h) | 46.64 mph (75.07 km/h) |
| 55 mph (88.51 km/h) | 51.31 mph (82.57 km/h) |
| 60 mph (96.56 km/h) | 55.97 mph (90.08 km/h) |
| 65 mph (104.61 km/h) | 60.64 mph (97.59 km/h) |
| 70 mph (112.65 km/h) | 65.3 mph (105.09 km/h) |
| 75 mph (120.7 km/h) | 69.97 mph (112.6 km/h) |
| 80 mph (128.75 km/h) | 74.63 mph (120.11 km/h) |
| 85 mph (136.79 km/h) | 79.3 mph (127.62 km/h) |
| 90 mph (144.84 km/h) | 83.96 mph (135.12 km/h) |
| 95 mph (152.89 km/h) | 88.63 mph (142.63 km/h) |
| 100 mph (160.93 km/h) | 93.29 mph (150.14 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
