Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.41 (721.5) | 28.66 (728) | 0.26 (6.5) 0.9% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 89.24 (2266.66) | 90.04 (2287.08) | 0.8 (20.42) 0.9% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 4.33 (110) | 0.13 (3.25) 3% |
| Revolutions per mile (km) | 710.01 (441.18) | 703.67 (437.24) | -6.34 (-3.94) -0.9% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.6 km/h) |
| 30 mph (48.28 km/h) | 30.27 mph (48.72 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.83 km/h) |
| 40 mph (64.37 km/h) | 40.36 mph (64.95 km/h) |
| 45 mph (72.42 km/h) | 45.41 mph (73.07 km/h) |
| 50 mph (80.47 km/h) | 50.45 mph (81.19 km/h) |
| 55 mph (88.51 km/h) | 55.5 mph (89.31 km/h) |
| 60 mph (96.56 km/h) | 60.54 mph (97.43 km/h) |
| 65 mph (104.61 km/h) | 65.59 mph (105.55 km/h) |
| 70 mph (112.65 km/h) | 70.63 mph (113.67 km/h) |
| 75 mph (120.7 km/h) | 75.68 mph (121.79 km/h) |
| 80 mph (128.75 km/h) | 80.72 mph (129.91 km/h) |
| 85 mph (136.79 km/h) | 85.77 mph (138.03 km/h) |
| 90 mph (144.84 km/h) | 90.81 mph (146.15 km/h) |
| 95 mph (152.89 km/h) | 95.86 mph (154.27 km/h) |
| 100 mph (160.93 km/h) | 100.9 mph (162.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1791 | 2080 | 2240 | 2339 | 2446 | 2522 | 2606 | 2705 | 2842 | 2979 | 3132 | 3254 | 3475 | 3719 | 3909 | 4031 | 4100 | 4351 | 4702 | 5464 |
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