Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/70-18 | 305/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.91 (912.2) | 32.61 (828.3) | -3.3 (-83.9) -9.2% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 112.83 (2865.76) | 102.45 (2602.18) | -10.38 (-263.58) -9.2% |
| Sidewall Height inches (mm) | 8.96 (227.5) | 7.81 (198.25) | -1.15 (-29.25) -12.9% |
| Revolutions per mile (km) | 561.58 (348.95) | 618.46 (384.29) | 56.88 (35.35) 10.1% |
305/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.16 mph (29.23 km/h) |
| 25 mph (40.23 km/h) | 22.7 mph (36.53 km/h) |
| 30 mph (48.28 km/h) | 27.24 mph (43.84 km/h) |
| 35 mph (56.33 km/h) | 31.78 mph (51.15 km/h) |
| 40 mph (64.37 km/h) | 36.32 mph (58.45 km/h) |
| 45 mph (72.42 km/h) | 40.86 mph (65.76 km/h) |
| 50 mph (80.47 km/h) | 45.4 mph (73.07 km/h) |
| 55 mph (88.51 km/h) | 49.94 mph (80.37 km/h) |
| 60 mph (96.56 km/h) | 54.48 mph (87.68 km/h) |
| 65 mph (104.61 km/h) | 59.02 mph (94.99 km/h) |
| 70 mph (112.65 km/h) | 63.56 mph (102.29 km/h) |
| 75 mph (120.7 km/h) | 68.1 mph (109.6 km/h) |
| 80 mph (128.75 km/h) | 72.64 mph (116.91 km/h) |
| 85 mph (136.79 km/h) | 77.18 mph (124.21 km/h) |
| 90 mph (144.84 km/h) | 81.72 mph (131.52 km/h) |
| 95 mph (152.89 km/h) | 86.26 mph (138.83 km/h) |
| 100 mph (160.93 km/h) | 90.8 mph (146.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1574 | 1828 | 1969 | 2056 | 2150 | 2217 | 2290 | 2378 | 2498 | 2619 | 2753 | 2860 | 3054 | 3268 | 3436 | 3543 | 3603 | 3824 | 4132 | 4802 |
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