Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-21 | 275/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.58 (725.9) | 29.66 (753.4) | 1.08 (27.5) 3.8% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 89.78 (2280.48) | 93.18 (2366.88) | 3.4 (86.39) 3.8% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.33 (110) | 0.54 (13.75) 14.3% |
| Revolutions per mile (km) | 705.7 (438.5) | 679.94 (422.5) | -25.76 (-16.01) -3.7% |
275/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.76 mph (33.41 km/h) |
| 25 mph (40.23 km/h) | 25.95 mph (41.76 km/h) |
| 30 mph (48.28 km/h) | 31.14 mph (50.11 km/h) |
| 35 mph (56.33 km/h) | 36.33 mph (58.46 km/h) |
| 40 mph (64.37 km/h) | 41.52 mph (66.81 km/h) |
| 45 mph (72.42 km/h) | 46.7 mph (75.16 km/h) |
| 50 mph (80.47 km/h) | 51.89 mph (83.52 km/h) |
| 55 mph (88.51 km/h) | 57.08 mph (91.87 km/h) |
| 60 mph (96.56 km/h) | 62.27 mph (100.22 km/h) |
| 65 mph (104.61 km/h) | 67.46 mph (108.57 km/h) |
| 70 mph (112.65 km/h) | 72.65 mph (116.92 km/h) |
| 75 mph (120.7 km/h) | 77.84 mph (125.27 km/h) |
| 80 mph (128.75 km/h) | 83.03 mph (133.63 km/h) |
| 85 mph (136.79 km/h) | 88.22 mph (141.98 km/h) |
| 90 mph (144.84 km/h) | 93.41 mph (150.33 km/h) |
| 95 mph (152.89 km/h) | 98.6 mph (158.68 km/h) |
| 100 mph (160.93 km/h) | 103.79 mph (167.03 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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