Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/60-15 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.1 (663) | 25.72 (653.2) | -0.39 (-9.8) -1.5% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 82 (2082.88) | 80.79 (2052.09) | -1.21 (-30.79) -1.5% |
| Sidewall Height inches (mm) | 5.55 (141) | 3.86 (98) | -1.69 (-43) -30.5% |
| Revolutions per mile (km) | 772.65 (480.1) | 784.25 (487.31) | 11.59 (7.2) 1.5% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.7 mph (31.71 km/h) |
| 25 mph (40.23 km/h) | 24.63 mph (39.64 km/h) |
| 30 mph (48.28 km/h) | 29.56 mph (47.57 km/h) |
| 35 mph (56.33 km/h) | 34.48 mph (55.49 km/h) |
| 40 mph (64.37 km/h) | 39.41 mph (63.42 km/h) |
| 45 mph (72.42 km/h) | 44.33 mph (71.35 km/h) |
| 50 mph (80.47 km/h) | 49.26 mph (79.28 km/h) |
| 55 mph (88.51 km/h) | 54.19 mph (87.21 km/h) |
| 60 mph (96.56 km/h) | 59.11 mph (95.13 km/h) |
| 65 mph (104.61 km/h) | 64.04 mph (103.06 km/h) |
| 70 mph (112.65 km/h) | 68.97 mph (110.99 km/h) |
| 75 mph (120.7 km/h) | 73.89 mph (118.92 km/h) |
| 80 mph (128.75 km/h) | 78.82 mph (126.84 km/h) |
| 85 mph (136.79 km/h) | 83.74 mph (134.77 km/h) |
| 90 mph (144.84 km/h) | 88.67 mph (142.7 km/h) |
| 95 mph (152.89 km/h) | 93.6 mph (150.63 km/h) |
| 100 mph (160.93 km/h) | 98.52 mph (158.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2318 | 2497 | 2607 | 2726 | 2811 | 2904 | 3015 | 3168 | 3321 | 3490 | 3626 | 3873 | 4144 | 4357 | 4493 | 4569 | 4849 | 5240 | 6089 |
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