Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/40-21 | 275/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.29 (769.4) | 29.66 (753.4) | -0.63 (-16) -2.1% |
| Width inches (mm) | 11.61 (295) | 10.83 (275) | -0.79 (-20) -6.8% |
| Circum. inches (mm) | 95.16 (2417.14) | 93.18 (2366.88) | -1.98 (-50.27) -2.1% |
| Sidewall Height inches (mm) | 4.65 (118) | 4.33 (110) | -0.31 (-8) -6.8% |
| Revolutions per mile (km) | 665.8 (413.71) | 679.94 (422.5) | 14.14 (8.79) 2.1% |
275/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.58 mph (31.52 km/h) |
| 25 mph (40.23 km/h) | 24.48 mph (39.4 km/h) |
| 30 mph (48.28 km/h) | 29.38 mph (47.28 km/h) |
| 35 mph (56.33 km/h) | 34.27 mph (55.16 km/h) |
| 40 mph (64.37 km/h) | 39.17 mph (63.04 km/h) |
| 45 mph (72.42 km/h) | 44.06 mph (70.91 km/h) |
| 50 mph (80.47 km/h) | 48.96 mph (78.79 km/h) |
| 55 mph (88.51 km/h) | 53.86 mph (86.67 km/h) |
| 60 mph (96.56 km/h) | 58.75 mph (94.55 km/h) |
| 65 mph (104.61 km/h) | 63.65 mph (102.43 km/h) |
| 70 mph (112.65 km/h) | 68.54 mph (110.31 km/h) |
| 75 mph (120.7 km/h) | 73.44 mph (118.19 km/h) |
| 80 mph (128.75 km/h) | 78.34 mph (126.07 km/h) |
| 85 mph (136.79 km/h) | 83.23 mph (133.95 km/h) |
| 90 mph (144.84 km/h) | 88.13 mph (141.83 km/h) |
| 95 mph (152.89 km/h) | 93.02 mph (149.71 km/h) |
| 100 mph (160.93 km/h) | 97.92 mph (157.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1730 | 2010 | 2165 | 2260 | 2364 | 2437 | 2518 | 2614 | 2746 | 2879 | 3026 | 3144 | 3358 | 3593 | 3777 | 3895 | 3961 | 4204 | 4543 | 5279 |
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