Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 345/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 27.51 (698.7) | 0.11 (2.8) 0.4% |
| Width inches (mm) | 12.8 (325) | 13.58 (345) | 0.79 (20) 6.2% |
| Circum. inches (mm) | 86.07 (2186.23) | 86.42 (2195.03) | 0.35 (8.8) 0.4% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.75 (120.75) | 1.56 (39.5) 48.6% |
| Revolutions per mile (km) | 736.13 (457.41) | 733.18 (455.57) | -2.95 (-1.83) -0.4% |
345/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.32 km/h) |
| 25 mph (40.23 km/h) | 25.1 mph (40.4 km/h) |
| 30 mph (48.28 km/h) | 30.12 mph (48.47 km/h) |
| 35 mph (56.33 km/h) | 35.14 mph (56.55 km/h) |
| 40 mph (64.37 km/h) | 40.16 mph (64.63 km/h) |
| 45 mph (72.42 km/h) | 45.18 mph (72.71 km/h) |
| 50 mph (80.47 km/h) | 50.2 mph (80.79 km/h) |
| 55 mph (88.51 km/h) | 55.22 mph (88.87 km/h) |
| 60 mph (96.56 km/h) | 60.24 mph (96.95 km/h) |
| 65 mph (104.61 km/h) | 65.26 mph (105.03 km/h) |
| 70 mph (112.65 km/h) | 70.28 mph (113.11 km/h) |
| 75 mph (120.7 km/h) | 75.3 mph (121.19 km/h) |
| 80 mph (128.75 km/h) | 80.32 mph (129.27 km/h) |
| 85 mph (136.79 km/h) | 85.34 mph (137.34 km/h) |
| 90 mph (144.84 km/h) | 90.36 mph (145.42 km/h) |
| 95 mph (152.89 km/h) | 95.38 mph (153.5 km/h) |
| 100 mph (160.93 km/h) | 100.4 mph (161.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1866 | 2167 | 2334 | 2437 | 2549 | 2628 | 2715 | 2819 | 2961 | 3104 | 3263 | 3390 | 3620 | 3874 | 4073 | 4200 | 4271 | 4533 | 4899 | 5693 |
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