Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-21 | 275/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.2 (716.4) | 28.58 (725.9) | 0.37 (9.5) 1.3% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 88.61 (2250.64) | 89.78 (2280.48) | 1.18 (29.85) 1.3% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 3.79 (96.25) | 0.19 (4.75) 5.2% |
| Revolutions per mile (km) | 715.06 (444.32) | 705.7 (438.5) | -9.36 (-5.81) -1.3% |
275/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.61 km/h) |
| 25 mph (40.23 km/h) | 25.33 mph (40.77 km/h) |
| 30 mph (48.28 km/h) | 30.4 mph (48.92 km/h) |
| 35 mph (56.33 km/h) | 35.46 mph (57.07 km/h) |
| 40 mph (64.37 km/h) | 40.53 mph (65.23 km/h) |
| 45 mph (72.42 km/h) | 45.6 mph (73.38 km/h) |
| 50 mph (80.47 km/h) | 50.66 mph (81.53 km/h) |
| 55 mph (88.51 km/h) | 55.73 mph (89.69 km/h) |
| 60 mph (96.56 km/h) | 60.8 mph (97.84 km/h) |
| 65 mph (104.61 km/h) | 65.86 mph (105.99 km/h) |
| 70 mph (112.65 km/h) | 70.93 mph (114.15 km/h) |
| 75 mph (120.7 km/h) | 75.99 mph (122.3 km/h) |
| 80 mph (128.75 km/h) | 81.06 mph (130.46 km/h) |
| 85 mph (136.79 km/h) | 86.13 mph (138.61 km/h) |
| 90 mph (144.84 km/h) | 91.19 mph (146.76 km/h) |
| 95 mph (152.89 km/h) | 96.26 mph (154.92 km/h) |
| 100 mph (160.93 km/h) | 101.33 mph (163.07 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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