Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/35-18 | 315/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.68 (677.7) | 25.44 (646.2) | -1.24 (-31.5) -4.6% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 83.82 (2129.06) | 79.93 (2030.1) | -3.9 (-98.96) -4.6% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 3.72 (94.5) | -0.62 (-15.75) -14.3% |
| Revolutions per mile (km) | 755.9 (469.69) | 792.74 (492.59) | 36.85 (22.9) 4.9% |
315/30-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.07 mph (30.69 km/h) |
| 25 mph (40.23 km/h) | 23.84 mph (38.36 km/h) |
| 30 mph (48.28 km/h) | 28.61 mph (46.04 km/h) |
| 35 mph (56.33 km/h) | 33.37 mph (53.71 km/h) |
| 40 mph (64.37 km/h) | 38.14 mph (61.38 km/h) |
| 45 mph (72.42 km/h) | 42.91 mph (69.05 km/h) |
| 50 mph (80.47 km/h) | 47.68 mph (76.73 km/h) |
| 55 mph (88.51 km/h) | 52.44 mph (84.4 km/h) |
| 60 mph (96.56 km/h) | 57.21 mph (92.07 km/h) |
| 65 mph (104.61 km/h) | 61.98 mph (99.75 km/h) |
| 70 mph (112.65 km/h) | 66.75 mph (107.42 km/h) |
| 75 mph (120.7 km/h) | 71.51 mph (115.09 km/h) |
| 80 mph (128.75 km/h) | 76.28 mph (122.76 km/h) |
| 85 mph (136.79 km/h) | 81.05 mph (130.44 km/h) |
| 90 mph (144.84 km/h) | 85.82 mph (138.11 km/h) |
| 95 mph (152.89 km/h) | 90.58 mph (145.78 km/h) |
| 100 mph (160.93 km/h) | 95.35 mph (153.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2344 | 2524 | 2635 | 2756 | 2841 | 2936 | 3048 | 3202 | 3357 | 3528 | 3666 | 3915 | 4189 | 4404 | 4541 | 4619 | 4902 | 5297 | 6155 |
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