Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 27.51 (698.7) | -0.64 (-16.3) -2.3% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 86.42 (2195.03) | -2.02 (-51.21) -2.3% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 4.75 (120.75) | 0.68 (17.25) 16.7% |
| Revolutions per mile (km) | 716.46 (445.19) | 733.18 (455.57) | 16.71 (10.39) 2.3% |
345/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.45 km/h) |
| 25 mph (40.23 km/h) | 24.43 mph (39.32 km/h) |
| 30 mph (48.28 km/h) | 29.32 mph (47.18 km/h) |
| 35 mph (56.33 km/h) | 34.2 mph (55.04 km/h) |
| 40 mph (64.37 km/h) | 39.09 mph (62.91 km/h) |
| 45 mph (72.42 km/h) | 43.97 mph (70.77 km/h) |
| 50 mph (80.47 km/h) | 48.86 mph (78.63 km/h) |
| 55 mph (88.51 km/h) | 53.75 mph (86.5 km/h) |
| 60 mph (96.56 km/h) | 58.63 mph (94.36 km/h) |
| 65 mph (104.61 km/h) | 63.52 mph (102.22 km/h) |
| 70 mph (112.65 km/h) | 68.4 mph (110.09 km/h) |
| 75 mph (120.7 km/h) | 73.29 mph (117.95 km/h) |
| 80 mph (128.75 km/h) | 78.18 mph (125.81 km/h) |
| 85 mph (136.79 km/h) | 83.06 mph (133.68 km/h) |
| 90 mph (144.84 km/h) | 87.95 mph (141.54 km/h) |
| 95 mph (152.89 km/h) | 92.83 mph (149.4 km/h) |
| 100 mph (160.93 km/h) | 97.72 mph (157.27 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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