Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (696) | 28.66 (728) | 1.26 (32) 4.6% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 86.08 (2186.55) | 90.04 (2287.08) | 3.96 (100.53) 4.6% |
| Sidewall Height inches (mm) | 3.7 (94) | 4.33 (110) | 0.63 (16) 17% |
| Revolutions per mile (km) | 736.02 (457.34) | 703.67 (437.24) | -32.35 (-20.1) -4.4% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.92 mph (33.67 km/h) |
| 25 mph (40.23 km/h) | 26.15 mph (42.08 km/h) |
| 30 mph (48.28 km/h) | 31.38 mph (50.5 km/h) |
| 35 mph (56.33 km/h) | 36.61 mph (58.92 km/h) |
| 40 mph (64.37 km/h) | 41.84 mph (67.33 km/h) |
| 45 mph (72.42 km/h) | 47.07 mph (75.75 km/h) |
| 50 mph (80.47 km/h) | 52.3 mph (84.17 km/h) |
| 55 mph (88.51 km/h) | 57.53 mph (92.58 km/h) |
| 60 mph (96.56 km/h) | 62.76 mph (101 km/h) |
| 65 mph (104.61 km/h) | 67.99 mph (109.42 km/h) |
| 70 mph (112.65 km/h) | 73.22 mph (117.83 km/h) |
| 75 mph (120.7 km/h) | 78.45 mph (126.25 km/h) |
| 80 mph (128.75 km/h) | 83.68 mph (134.67 km/h) |
| 85 mph (136.79 km/h) | 88.91 mph (143.08 km/h) |
| 90 mph (144.84 km/h) | 94.14 mph (151.5 km/h) |
| 95 mph (152.89 km/h) | 99.37 mph (159.92 km/h) |
| 100 mph (160.93 km/h) | 104.6 mph (168.33 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 |
Better Fuel Economy Factory Ratios Increased Power
