Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/40-18 | 255/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.29 (693.2) | 26.03 (661.2) | -1.26 (-32) -4.6% |
| Width inches (mm) | 11.61 (295) | 10.04 (255) | -1.57 (-40) -13.6% |
| Circum. inches (mm) | 85.74 (2177.75) | 81.78 (2077.22) | -3.96 (-100.53) -4.6% |
| Sidewall Height inches (mm) | 4.65 (118) | 4.02 (102) | -0.63 (-16) -13.6% |
| Revolutions per mile (km) | 738.99 (459.19) | 774.76 (481.41) | 35.76 (22.22) 4.8% |
255/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.7 km/h) |
| 25 mph (40.23 km/h) | 23.85 mph (38.38 km/h) |
| 30 mph (48.28 km/h) | 28.62 mph (46.05 km/h) |
| 35 mph (56.33 km/h) | 33.38 mph (53.73 km/h) |
| 40 mph (64.37 km/h) | 38.15 mph (61.4 km/h) |
| 45 mph (72.42 km/h) | 42.92 mph (69.08 km/h) |
| 50 mph (80.47 km/h) | 47.69 mph (76.75 km/h) |
| 55 mph (88.51 km/h) | 52.46 mph (84.43 km/h) |
| 60 mph (96.56 km/h) | 57.23 mph (92.1 km/h) |
| 65 mph (104.61 km/h) | 62 mph (99.78 km/h) |
| 70 mph (112.65 km/h) | 66.77 mph (107.45 km/h) |
| 75 mph (120.7 km/h) | 71.54 mph (115.13 km/h) |
| 80 mph (128.75 km/h) | 76.31 mph (122.8 km/h) |
| 85 mph (136.79 km/h) | 81.08 mph (130.48 km/h) |
| 90 mph (144.84 km/h) | 85.85 mph (138.15 km/h) |
| 95 mph (152.89 km/h) | 90.61 mph (145.83 km/h) |
| 100 mph (160.93 km/h) | 95.38 mph (153.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1972 | 2290 | 2467 | 2576 | 2693 | 2777 | 2869 | 2978 | 3129 | 3280 | 3448 | 3582 | 3826 | 4094 | 4304 | 4438 | 4514 | 4791 | 5177 | 6016 |
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