Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/60-16 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.1 (688.4) | 25.72 (653.2) | -1.39 (-35.2) -5.1% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 85.14 (2162.67) | 80.79 (2052.09) | -4.35 (-110.58) -5.1% |
| Sidewall Height inches (mm) | 5.55 (141) | 3.86 (98) | -1.69 (-43) -30.5% |
| Revolutions per mile (km) | 744.15 (462.39) | 784.25 (487.31) | 40.1 (24.92) 5.4% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.98 mph (30.54 km/h) |
| 25 mph (40.23 km/h) | 23.72 mph (38.18 km/h) |
| 30 mph (48.28 km/h) | 28.47 mph (45.81 km/h) |
| 35 mph (56.33 km/h) | 33.21 mph (53.45 km/h) |
| 40 mph (64.37 km/h) | 37.95 mph (61.08 km/h) |
| 45 mph (72.42 km/h) | 42.7 mph (68.72 km/h) |
| 50 mph (80.47 km/h) | 47.44 mph (76.35 km/h) |
| 55 mph (88.51 km/h) | 52.19 mph (83.99 km/h) |
| 60 mph (96.56 km/h) | 56.93 mph (91.62 km/h) |
| 65 mph (104.61 km/h) | 61.68 mph (99.26 km/h) |
| 70 mph (112.65 km/h) | 66.42 mph (106.89 km/h) |
| 75 mph (120.7 km/h) | 71.17 mph (114.53 km/h) |
| 80 mph (128.75 km/h) | 75.91 mph (122.16 km/h) |
| 85 mph (136.79 km/h) | 80.65 mph (129.8 km/h) |
| 90 mph (144.84 km/h) | 85.4 mph (137.44 km/h) |
| 95 mph (152.89 km/h) | 90.14 mph (145.07 km/h) |
| 100 mph (160.93 km/h) | 94.89 mph (152.71 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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