Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 195/80-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.28 (693) | 29.99 (761.78) | 2.71 (68.78) 9.9% |
| Width inches (mm) | 7.68 (195) | 9.49 (241) | 1.81 (46) 23.6% |
| Circum. inches (mm) | 85.71 (2177.12) | 94.22 (2393.2) | 8.51 (216.08) 9.9% |
| Sidewall Height inches (mm) | 6.14 (156) | 7.5 (190.39) | 1.35 (34.39) 22% |
| Revolutions per mile (km) | 739.21 (459.32) | 672.46 (417.85) | -66.74 (-41.47) -9% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.98 mph (35.38 km/h) |
| 25 mph (40.23 km/h) | 27.48 mph (44.23 km/h) |
| 30 mph (48.28 km/h) | 32.98 mph (53.07 km/h) |
| 35 mph (56.33 km/h) | 38.47 mph (61.92 km/h) |
| 40 mph (64.37 km/h) | 43.97 mph (70.76 km/h) |
| 45 mph (72.42 km/h) | 49.47 mph (79.61 km/h) |
| 50 mph (80.47 km/h) | 54.96 mph (88.45 km/h) |
| 55 mph (88.51 km/h) | 60.46 mph (97.3 km/h) |
| 60 mph (96.56 km/h) | 65.95 mph (106.14 km/h) |
| 65 mph (104.61 km/h) | 71.45 mph (114.99 km/h) |
| 70 mph (112.65 km/h) | 76.95 mph (123.84 km/h) |
| 75 mph (120.7 km/h) | 82.44 mph (132.68 km/h) |
| 80 mph (128.75 km/h) | 87.94 mph (141.53 km/h) |
| 85 mph (136.79 km/h) | 93.44 mph (150.37 km/h) |
| 90 mph (144.84 km/h) | 98.93 mph (159.22 km/h) |
| 95 mph (152.89 km/h) | 104.43 mph (168.06 km/h) |
| 100 mph (160.93 km/h) | 109.92 mph (176.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1988 | 2141 | 2236 | 2338 | 2410 | 2490 | 2585 | 2716 | 2847 | 2993 | 3109 | 3321 | 3554 | 3736 | 3852 | 3918 | 4158 | 4493 | 5221 |
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