Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.54 (775.7) | 33.16 (842.2) | 2.62 (66.5) 8.6% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 95.94 (2436.93) | 104.17 (2645.85) | 8.23 (208.92) 8.6% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 7.58 (192.5) | 1.31 (33.25) 20.9% |
| Revolutions per mile (km) | 660.4 (410.35) | 608.25 (377.95) | -52.14 (-32.4) -7.9% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.71 mph (34.95 km/h) |
| 25 mph (40.23 km/h) | 27.14 mph (43.68 km/h) |
| 30 mph (48.28 km/h) | 32.57 mph (52.42 km/h) |
| 35 mph (56.33 km/h) | 38 mph (61.16 km/h) |
| 40 mph (64.37 km/h) | 43.43 mph (69.89 km/h) |
| 45 mph (72.42 km/h) | 48.86 mph (78.63 km/h) |
| 50 mph (80.47 km/h) | 54.29 mph (87.37 km/h) |
| 55 mph (88.51 km/h) | 59.72 mph (96.1 km/h) |
| 60 mph (96.56 km/h) | 65.14 mph (104.84 km/h) |
| 65 mph (104.61 km/h) | 70.57 mph (113.58 km/h) |
| 70 mph (112.65 km/h) | 76 mph (122.31 km/h) |
| 75 mph (120.7 km/h) | 81.43 mph (131.05 km/h) |
| 80 mph (128.75 km/h) | 86.86 mph (139.79 km/h) |
| 85 mph (136.79 km/h) | 92.29 mph (148.52 km/h) |
| 90 mph (144.84 km/h) | 97.72 mph (157.26 km/h) |
| 95 mph (152.89 km/h) | 103.14 mph (165.99 km/h) |
| 100 mph (160.93 km/h) | 108.57 mph (174.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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