Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/35-21 | 315/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.13 (739.9) | 30.92 (785.4) | 1.79 (45.5) 6.1% |
| Width inches (mm) | 11.61 (295) | 12.4 (315) | 0.79 (20) 6.8% |
| Circum. inches (mm) | 91.51 (2324.46) | 97.14 (2467.41) | 5.63 (142.94) 6.1% |
| Sidewall Height inches (mm) | 4.06 (103.25) | 4.96 (126) | 0.9 (22.75) 22% |
| Revolutions per mile (km) | 692.35 (430.21) | 652.24 (405.28) | -40.11 (-24.92) -5.8% |
315/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.23 mph (34.17 km/h) |
| 25 mph (40.23 km/h) | 26.54 mph (42.71 km/h) |
| 30 mph (48.28 km/h) | 31.84 mph (51.25 km/h) |
| 35 mph (56.33 km/h) | 37.15 mph (59.79 km/h) |
| 40 mph (64.37 km/h) | 42.46 mph (68.33 km/h) |
| 45 mph (72.42 km/h) | 47.77 mph (76.87 km/h) |
| 50 mph (80.47 km/h) | 53.07 mph (85.42 km/h) |
| 55 mph (88.51 km/h) | 58.38 mph (93.96 km/h) |
| 60 mph (96.56 km/h) | 63.69 mph (102.5 km/h) |
| 65 mph (104.61 km/h) | 69 mph (111.04 km/h) |
| 70 mph (112.65 km/h) | 74.3 mph (119.58 km/h) |
| 75 mph (120.7 km/h) | 79.61 mph (128.12 km/h) |
| 80 mph (128.75 km/h) | 84.92 mph (136.67 km/h) |
| 85 mph (136.79 km/h) | 90.23 mph (145.21 km/h) |
| 90 mph (144.84 km/h) | 95.53 mph (153.75 km/h) |
| 95 mph (152.89 km/h) | 100.84 mph (162.29 km/h) |
| 100 mph (160.93 km/h) | 106.15 mph (170.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1660 | 1928 | 2077 | 2168 | 2267 | 2338 | 2416 | 2507 | 2635 | 2762 | 2903 | 3016 | 3221 | 3447 | 3623 | 3736 | 3800 | 4033 | 4358 | 5064 |
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