Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/35-28 | 40/15.5-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.96 (938.7) | 40.13 (1019.36) | 3.18 (80.66) 8.6% |
| Width inches (mm) | 12.8 (325) | 15.51 (394) | 2.72 (69) 21.2% |
| Circum. inches (mm) | 116.1 (2949.01) | 126.08 (3202.41) | 9.98 (253.4) 8.6% |
| Sidewall Height inches (mm) | 4.48 (113.75) | 8.07 (204.88) | 3.59 (91.13) 80.1% |
| Revolutions per mile (km) | 545.72 (339.1) | 502.54 (312.26) | -43.18 (-26.83) -7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.72 mph (34.95 km/h) |
| 25 mph (40.23 km/h) | 27.15 mph (43.69 km/h) |
| 30 mph (48.28 km/h) | 32.58 mph (52.43 km/h) |
| 35 mph (56.33 km/h) | 38.01 mph (61.17 km/h) |
| 40 mph (64.37 km/h) | 43.44 mph (69.91 km/h) |
| 45 mph (72.42 km/h) | 48.87 mph (78.64 km/h) |
| 50 mph (80.47 km/h) | 54.3 mph (87.38 km/h) |
| 55 mph (88.51 km/h) | 59.73 mph (96.12 km/h) |
| 60 mph (96.56 km/h) | 65.16 mph (104.86 km/h) |
| 65 mph (104.61 km/h) | 70.59 mph (113.6 km/h) |
| 70 mph (112.65 km/h) | 76.01 mph (122.33 km/h) |
| 75 mph (120.7 km/h) | 81.44 mph (131.07 km/h) |
| 80 mph (128.75 km/h) | 86.87 mph (139.81 km/h) |
| 85 mph (136.79 km/h) | 92.3 mph (148.55 km/h) |
| 90 mph (144.84 km/h) | 97.73 mph (157.29 km/h) |
| 95 mph (152.89 km/h) | 103.16 mph (166.03 km/h) |
| 100 mph (160.93 km/h) | 108.59 mph (174.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1279 | 1486 | 1600 | 1671 | 1747 | 1801 | 1861 | 1932 | 2030 | 2128 | 2237 | 2324 | 2482 | 2656 | 2792 | 2879 | 2928 | 3107 | 3358 | 3902 |
Better Fuel Economy Factory Ratios Increased Power
