Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 33.16 (842.2) | -3.44 (-87.5) -9.4% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 114.99 (2920.74) | 104.17 (2645.85) | -10.82 (-274.89) -9.4% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 7.58 (192.5) | -1.72 (-43.75) -18.5% |
| Revolutions per mile (km) | 551.01 (342.38) | 608.25 (377.95) | 57.25 (35.57) 10.4% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.12 mph (29.16 km/h) |
| 25 mph (40.23 km/h) | 22.65 mph (36.45 km/h) |
| 30 mph (48.28 km/h) | 27.18 mph (43.74 km/h) |
| 35 mph (56.33 km/h) | 31.71 mph (51.03 km/h) |
| 40 mph (64.37 km/h) | 36.24 mph (58.32 km/h) |
| 45 mph (72.42 km/h) | 40.76 mph (65.6 km/h) |
| 50 mph (80.47 km/h) | 45.29 mph (72.89 km/h) |
| 55 mph (88.51 km/h) | 49.82 mph (80.18 km/h) |
| 60 mph (96.56 km/h) | 54.35 mph (87.47 km/h) |
| 65 mph (104.61 km/h) | 58.88 mph (94.76 km/h) |
| 70 mph (112.65 km/h) | 63.41 mph (102.05 km/h) |
| 75 mph (120.7 km/h) | 67.94 mph (109.34 km/h) |
| 80 mph (128.75 km/h) | 72.47 mph (116.63 km/h) |
| 85 mph (136.79 km/h) | 77 mph (123.92 km/h) |
| 90 mph (144.84 km/h) | 81.53 mph (131.21 km/h) |
| 95 mph (152.89 km/h) | 86.06 mph (138.5 km/h) |
| 100 mph (160.93 km/h) | 90.59 mph (145.79 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 |
Better Fuel Economy Factory Ratios Increased Power
