Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 305/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 28.41 (721.5) | -0.26 (-6.5) -0.9% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 90.04 (2287.08) | 89.24 (2266.66) | -0.8 (-20.42) -0.9% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.2 (106.75) | -0.13 (-3.25) -3% |
| Revolutions per mile (km) | 703.67 (437.24) | 710.01 (441.18) | 6.34 (3.94) 0.9% |
305/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.9 km/h) |
| 25 mph (40.23 km/h) | 24.78 mph (39.87 km/h) |
| 30 mph (48.28 km/h) | 29.73 mph (47.85 km/h) |
| 35 mph (56.33 km/h) | 34.69 mph (55.82 km/h) |
| 40 mph (64.37 km/h) | 39.64 mph (63.8 km/h) |
| 45 mph (72.42 km/h) | 44.6 mph (71.77 km/h) |
| 50 mph (80.47 km/h) | 49.55 mph (79.75 km/h) |
| 55 mph (88.51 km/h) | 54.51 mph (87.72 km/h) |
| 60 mph (96.56 km/h) | 59.46 mph (95.7 km/h) |
| 65 mph (104.61 km/h) | 64.42 mph (103.67 km/h) |
| 70 mph (112.65 km/h) | 69.38 mph (111.65 km/h) |
| 75 mph (120.7 km/h) | 74.33 mph (119.62 km/h) |
| 80 mph (128.75 km/h) | 79.29 mph (127.6 km/h) |
| 85 mph (136.79 km/h) | 84.24 mph (135.57 km/h) |
| 90 mph (144.84 km/h) | 89.2 mph (143.55 km/h) |
| 95 mph (152.89 km/h) | 94.15 mph (151.52 km/h) |
| 100 mph (160.93 km/h) | 99.11 mph (159.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1807 | 2099 | 2260 | 2360 | 2468 | 2545 | 2630 | 2729 | 2868 | 3006 | 3160 | 3283 | 3506 | 3752 | 3944 | 4067 | 4136 | 4390 | 4744 | 5513 |
Better Fuel Economy Factory Ratios Increased Power
