Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 315/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 29.88 (759) | -0.47 (-12) -1.6% |
| Width inches (mm) | 12.8 (325) | 12.4 (315) | -0.39 (-10) -3.1% |
| Circum. inches (mm) | 95.36 (2422.17) | 93.88 (2384.47) | -1.48 (-37.7) -1.6% |
| Sidewall Height inches (mm) | 7.68 (195) | 7.44 (189) | -0.24 (-6) -3.1% |
| Revolutions per mile (km) | 664.42 (412.85) | 674.93 (419.38) | 10.5 (6.53) 1.6% |
315/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.69 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.61 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.53 km/h) |
| 35 mph (56.33 km/h) | 34.46 mph (55.45 km/h) |
| 40 mph (64.37 km/h) | 39.38 mph (63.37 km/h) |
| 45 mph (72.42 km/h) | 44.3 mph (71.29 km/h) |
| 50 mph (80.47 km/h) | 49.22 mph (79.21 km/h) |
| 55 mph (88.51 km/h) | 54.14 mph (87.14 km/h) |
| 60 mph (96.56 km/h) | 59.07 mph (95.06 km/h) |
| 65 mph (104.61 km/h) | 63.99 mph (102.98 km/h) |
| 70 mph (112.65 km/h) | 68.91 mph (110.9 km/h) |
| 75 mph (120.7 km/h) | 73.83 mph (118.82 km/h) |
| 80 mph (128.75 km/h) | 78.75 mph (126.74 km/h) |
| 85 mph (136.79 km/h) | 83.68 mph (134.67 km/h) |
| 90 mph (144.84 km/h) | 88.6 mph (142.59 km/h) |
| 95 mph (152.89 km/h) | 93.52 mph (150.51 km/h) |
| 100 mph (160.93 km/h) | 98.44 mph (158.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1718 | 1995 | 2149 | 2244 | 2346 | 2419 | 2500 | 2595 | 2726 | 2858 | 3004 | 3121 | 3333 | 3567 | 3749 | 3866 | 3932 | 4173 | 4510 | 5240 |
Better Fuel Economy Factory Ratios Increased Power
