Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/45-16 | 305/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.16 (689.9) | 33.61 (853.7) | 6.45 (163.8) 23.7% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 85.33 (2167.38) | 105.59 (2681.98) | 20.26 (514.59) 23.7% |
| Sidewall Height inches (mm) | 5.58 (141.75) | 7.81 (198.25) | 2.22 (56.5) 39.9% |
| Revolutions per mile (km) | 742.53 (461.38) | 600.06 (372.86) | -142.47 (-88.53) -19.2% |
305/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.75 mph (39.83 km/h) |
| 25 mph (40.23 km/h) | 30.94 mph (49.79 km/h) |
| 30 mph (48.28 km/h) | 37.12 mph (59.74 km/h) |
| 35 mph (56.33 km/h) | 43.31 mph (69.7 km/h) |
| 40 mph (64.37 km/h) | 49.5 mph (79.66 km/h) |
| 45 mph (72.42 km/h) | 55.68 mph (89.62 km/h) |
| 50 mph (80.47 km/h) | 61.87 mph (99.57 km/h) |
| 55 mph (88.51 km/h) | 68.06 mph (109.53 km/h) |
| 60 mph (96.56 km/h) | 74.25 mph (119.49 km/h) |
| 65 mph (104.61 km/h) | 80.43 mph (129.44 km/h) |
| 70 mph (112.65 km/h) | 86.62 mph (139.4 km/h) |
| 75 mph (120.7 km/h) | 92.81 mph (149.36 km/h) |
| 80 mph (128.75 km/h) | 98.99 mph (159.32 km/h) |
| 85 mph (136.79 km/h) | 105.18 mph (169.27 km/h) |
| 90 mph (144.84 km/h) | 111.37 mph (179.23 km/h) |
| 95 mph (152.89 km/h) | 117.56 mph (189.19 km/h) |
| 100 mph (160.93 km/h) | 123.74 mph (199.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1527 | 1774 | 1910 | 1995 | 2086 | 2151 | 2222 | 2307 | 2424 | 2541 | 2671 | 2775 | 2963 | 3171 | 3333 | 3437 | 3496 | 3710 | 4009 | 4659 |
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