Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-18 | 305/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.35 (847.2) | 32.41 (823.2) | -0.94 (-24) -2.8% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 104.79 (2661.56) | 101.82 (2586.16) | -2.97 (-75.4) -2.8% |
| Sidewall Height inches (mm) | 7.68 (195) | 7.2 (183) | -0.47 (-12) -6.2% |
| Revolutions per mile (km) | 604.66 (375.72) | 622.29 (386.67) | 17.63 (10.95) 2.9% |
305/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.29 mph (39.09 km/h) |
| 30 mph (48.28 km/h) | 29.15 mph (46.91 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.73 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.55 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.37 km/h) |
| 50 mph (80.47 km/h) | 48.58 mph (78.19 km/h) |
| 55 mph (88.51 km/h) | 53.44 mph (86.01 km/h) |
| 60 mph (96.56 km/h) | 58.3 mph (93.83 km/h) |
| 65 mph (104.61 km/h) | 63.16 mph (101.64 km/h) |
| 70 mph (112.65 km/h) | 68.02 mph (109.46 km/h) |
| 75 mph (120.7 km/h) | 72.88 mph (117.28 km/h) |
| 80 mph (128.75 km/h) | 77.73 mph (125.1 km/h) |
| 85 mph (136.79 km/h) | 82.59 mph (132.92 km/h) |
| 90 mph (144.84 km/h) | 87.45 mph (140.74 km/h) |
| 95 mph (152.89 km/h) | 92.31 mph (148.56 km/h) |
| 100 mph (160.93 km/h) | 97.17 mph (156.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1584 | 1840 | 1981 | 2069 | 2163 | 2231 | 2305 | 2392 | 2514 | 2635 | 2770 | 2877 | 3073 | 3289 | 3457 | 3565 | 3625 | 3848 | 4158 | 4832 |
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