Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 255/30-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 30.02 (762.6) | 0.93 (23.6) 3.2% |
| Width inches (mm) | 6.5 (165) | 10.04 (255) | 3.54 (90) 54.5% |
| Circum. inches (mm) | 91.4 (2321.64) | 94.32 (2395.78) | 2.92 (74.14) 3.2% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 3.01 (76.5) | -1.54 (-39) -33.8% |
| Revolutions per mile (km) | 693.19 (430.73) | 671.74 (417.4) | -21.45 (-13.33) -3.1% |
255/30-24 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.64 mph (33.21 km/h) |
| 25 mph (40.23 km/h) | 25.8 mph (41.52 km/h) |
| 30 mph (48.28 km/h) | 30.96 mph (49.82 km/h) |
| 35 mph (56.33 km/h) | 36.12 mph (58.13 km/h) |
| 40 mph (64.37 km/h) | 41.28 mph (66.43 km/h) |
| 45 mph (72.42 km/h) | 46.44 mph (74.73 km/h) |
| 50 mph (80.47 km/h) | 51.6 mph (83.04 km/h) |
| 55 mph (88.51 km/h) | 56.76 mph (91.34 km/h) |
| 60 mph (96.56 km/h) | 61.92 mph (99.64 km/h) |
| 65 mph (104.61 km/h) | 67.08 mph (107.95 km/h) |
| 70 mph (112.65 km/h) | 72.24 mph (116.25 km/h) |
| 75 mph (120.7 km/h) | 77.4 mph (124.56 km/h) |
| 80 mph (128.75 km/h) | 82.55 mph (132.86 km/h) |
| 85 mph (136.79 km/h) | 87.71 mph (141.16 km/h) |
| 90 mph (144.84 km/h) | 92.87 mph (149.47 km/h) |
| 95 mph (152.89 km/h) | 98.03 mph (157.77 km/h) |
| 100 mph (160.93 km/h) | 103.19 mph (166.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1986 | 2139 | 2233 | 2335 | 2408 | 2488 | 2582 | 2713 | 2844 | 2990 | 3106 | 3317 | 3550 | 3732 | 3848 | 3914 | 4154 | 4488 | 5216 |
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