Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 245/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 24.75 (628.7) | -2.65 (-67.2) -9.7% |
| Width inches (mm) | 12.8 (325) | 9.65 (245) | -3.15 (-80) -24.6% |
| Circum. inches (mm) | 86.07 (2186.23) | 77.76 (1975.12) | -8.31 (-211.12) -9.7% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.38 (85.75) | 0.18 (4.5) 5.5% |
| Revolutions per mile (km) | 736.13 (457.41) | 814.81 (506.3) | 78.68 (48.89) 10.7% |
245/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.07 mph (29.08 km/h) |
| 25 mph (40.23 km/h) | 22.59 mph (36.35 km/h) |
| 30 mph (48.28 km/h) | 27.1 mph (43.62 km/h) |
| 35 mph (56.33 km/h) | 31.62 mph (50.89 km/h) |
| 40 mph (64.37 km/h) | 36.14 mph (58.16 km/h) |
| 45 mph (72.42 km/h) | 40.65 mph (65.43 km/h) |
| 50 mph (80.47 km/h) | 45.17 mph (72.7 km/h) |
| 55 mph (88.51 km/h) | 49.69 mph (79.97 km/h) |
| 60 mph (96.56 km/h) | 54.21 mph (87.24 km/h) |
| 65 mph (104.61 km/h) | 58.72 mph (94.51 km/h) |
| 70 mph (112.65 km/h) | 63.24 mph (101.78 km/h) |
| 75 mph (120.7 km/h) | 67.76 mph (109.05 km/h) |
| 80 mph (128.75 km/h) | 72.27 mph (116.32 km/h) |
| 85 mph (136.79 km/h) | 76.79 mph (123.58 km/h) |
| 90 mph (144.84 km/h) | 81.31 mph (130.85 km/h) |
| 95 mph (152.89 km/h) | 85.83 mph (138.12 km/h) |
| 100 mph (160.93 km/h) | 90.34 mph (145.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2074 | 2409 | 2594 | 2709 | 2832 | 2921 | 3018 | 3132 | 3291 | 3450 | 3626 | 3768 | 4024 | 4306 | 4526 | 4668 | 4747 | 5038 | 5444 | 6326 |
Better Fuel Economy Factory Ratios Increased Power
