Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 235/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 26.1 (663) | -2.13 (-54.2) -7.6% |
| Width inches (mm) | 12.8 (325) | 9.25 (235) | -3.54 (-90) -27.7% |
| Circum. inches (mm) | 88.71 (2253.15) | 82 (2082.88) | -6.7 (-170.27) -7.6% |
| Sidewall Height inches (mm) | 5.12 (130) | 5.55 (141) | 0.43 (11) 8.5% |
| Revolutions per mile (km) | 714.26 (443.82) | 772.65 (480.1) | 58.39 (36.28) 8.2% |
235/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.49 mph (29.75 km/h) |
| 25 mph (40.23 km/h) | 23.11 mph (37.19 km/h) |
| 30 mph (48.28 km/h) | 27.73 mph (44.63 km/h) |
| 35 mph (56.33 km/h) | 32.35 mph (52.07 km/h) |
| 40 mph (64.37 km/h) | 36.98 mph (59.51 km/h) |
| 45 mph (72.42 km/h) | 41.6 mph (66.95 km/h) |
| 50 mph (80.47 km/h) | 46.22 mph (74.39 km/h) |
| 55 mph (88.51 km/h) | 50.84 mph (81.82 km/h) |
| 60 mph (96.56 km/h) | 55.47 mph (89.26 km/h) |
| 65 mph (104.61 km/h) | 60.09 mph (96.7 km/h) |
| 70 mph (112.65 km/h) | 64.71 mph (104.14 km/h) |
| 75 mph (120.7 km/h) | 69.33 mph (111.58 km/h) |
| 80 mph (128.75 km/h) | 73.95 mph (119.02 km/h) |
| 85 mph (136.79 km/h) | 78.58 mph (126.46 km/h) |
| 90 mph (144.84 km/h) | 83.2 mph (133.9 km/h) |
| 95 mph (152.89 km/h) | 87.82 mph (141.33 km/h) |
| 100 mph (160.93 km/h) | 92.44 mph (148.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1966 | 2284 | 2460 | 2569 | 2686 | 2769 | 2862 | 2970 | 3121 | 3272 | 3439 | 3573 | 3815 | 4083 | 4292 | 4426 | 4501 | 4778 | 5162 | 5999 |
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