Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-21 | 275/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.03 (737.4) | 28.58 (725.9) | -0.45 (-11.5) -1.6% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 91.21 (2316.61) | 89.78 (2280.48) | -1.42 (-36.13) -1.6% |
| Sidewall Height inches (mm) | 4.02 (102) | 3.79 (96.25) | -0.23 (-5.75) -5.6% |
| Revolutions per mile (km) | 694.7 (431.66) | 705.7 (438.5) | 11.01 (6.84) 1.6% |
275/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.68 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.61 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.53 km/h) |
| 35 mph (56.33 km/h) | 34.45 mph (55.45 km/h) |
| 40 mph (64.37 km/h) | 39.38 mph (63.37 km/h) |
| 45 mph (72.42 km/h) | 44.3 mph (71.29 km/h) |
| 50 mph (80.47 km/h) | 49.22 mph (79.21 km/h) |
| 55 mph (88.51 km/h) | 54.14 mph (87.13 km/h) |
| 60 mph (96.56 km/h) | 59.06 mph (95.05 km/h) |
| 65 mph (104.61 km/h) | 63.99 mph (102.98 km/h) |
| 70 mph (112.65 km/h) | 68.91 mph (110.9 km/h) |
| 75 mph (120.7 km/h) | 73.83 mph (118.82 km/h) |
| 80 mph (128.75 km/h) | 78.75 mph (126.74 km/h) |
| 85 mph (136.79 km/h) | 83.67 mph (134.66 km/h) |
| 90 mph (144.84 km/h) | 88.6 mph (142.58 km/h) |
| 95 mph (152.89 km/h) | 93.52 mph (150.5 km/h) |
| 100 mph (160.93 km/h) | 98.44 mph (158.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1796 | 2086 | 2247 | 2346 | 2453 | 2530 | 2614 | 2713 | 2850 | 2988 | 3141 | 3263 | 3485 | 3729 | 3920 | 4043 | 4111 | 4364 | 4715 | 5479 |
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