Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-21 | 295/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.74 (780.9) | 30.29 (769.4) | -0.45 (-11.5) -1.5% |
| Width inches (mm) | 10.83 (275) | 11.61 (295) | 0.79 (20) 7.3% |
| Circum. inches (mm) | 96.59 (2453.27) | 95.16 (2417.14) | -1.42 (-36.13) -1.5% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.65 (118) | -0.23 (-5.75) -4.6% |
| Revolutions per mile (km) | 656 (407.62) | 665.8 (413.71) | 9.81 (6.09) 1.5% |
295/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.71 mph (31.71 km/h) |
| 25 mph (40.23 km/h) | 24.63 mph (39.64 km/h) |
| 30 mph (48.28 km/h) | 29.56 mph (47.57 km/h) |
| 35 mph (56.33 km/h) | 34.48 mph (55.5 km/h) |
| 40 mph (64.37 km/h) | 39.41 mph (63.43 km/h) |
| 45 mph (72.42 km/h) | 44.34 mph (71.35 km/h) |
| 50 mph (80.47 km/h) | 49.26 mph (79.28 km/h) |
| 55 mph (88.51 km/h) | 54.19 mph (87.21 km/h) |
| 60 mph (96.56 km/h) | 59.12 mph (95.14 km/h) |
| 65 mph (104.61 km/h) | 64.04 mph (103.07 km/h) |
| 70 mph (112.65 km/h) | 68.97 mph (111 km/h) |
| 75 mph (120.7 km/h) | 73.9 mph (118.92 km/h) |
| 80 mph (128.75 km/h) | 78.82 mph (126.85 km/h) |
| 85 mph (136.79 km/h) | 83.75 mph (134.78 km/h) |
| 90 mph (144.84 km/h) | 88.67 mph (142.71 km/h) |
| 95 mph (152.89 km/h) | 93.6 mph (150.64 km/h) |
| 100 mph (160.93 km/h) | 98.53 mph (158.56 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 |
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