Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-20 | 295/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736) | 30.29 (769.4) | 1.31 (33.4) 4.5% |
| Width inches (mm) | 11.22 (285) | 11.61 (295) | 0.39 (10) 3.5% |
| Circum. inches (mm) | 91.03 (2312.21) | 95.16 (2417.14) | 4.13 (104.93) 4.5% |
| Sidewall Height inches (mm) | 4.49 (114) | 4.65 (118) | 0.16 (4) 3.5% |
| Revolutions per mile (km) | 696.02 (432.49) | 665.8 (413.71) | -30.21 (-18.77) -4.3% |
295/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.91 mph (33.65 km/h) |
| 25 mph (40.23 km/h) | 26.13 mph (42.06 km/h) |
| 30 mph (48.28 km/h) | 31.36 mph (50.47 km/h) |
| 35 mph (56.33 km/h) | 36.59 mph (58.88 km/h) |
| 40 mph (64.37 km/h) | 41.82 mph (67.3 km/h) |
| 45 mph (72.42 km/h) | 47.04 mph (75.71 km/h) |
| 50 mph (80.47 km/h) | 52.27 mph (84.12 km/h) |
| 55 mph (88.51 km/h) | 57.5 mph (92.53 km/h) |
| 60 mph (96.56 km/h) | 62.72 mph (100.94 km/h) |
| 65 mph (104.61 km/h) | 67.95 mph (109.35 km/h) |
| 70 mph (112.65 km/h) | 73.18 mph (117.77 km/h) |
| 75 mph (120.7 km/h) | 78.4 mph (126.18 km/h) |
| 80 mph (128.75 km/h) | 83.63 mph (134.59 km/h) |
| 85 mph (136.79 km/h) | 88.86 mph (143 km/h) |
| 90 mph (144.84 km/h) | 94.08 mph (151.41 km/h) |
| 95 mph (152.89 km/h) | 99.31 mph (159.83 km/h) |
| 100 mph (160.93 km/h) | 104.54 mph (168.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1694 | 1968 | 2120 | 2213 | 2314 | 2387 | 2466 | 2560 | 2689 | 2819 | 2963 | 3079 | 3288 | 3518 | 3699 | 3814 | 3879 | 4117 | 4449 | 5170 |
Better Fuel Economy Factory Ratios Increased Power
