Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-23 | 305/40-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.2 (767.2) | 32.61 (828.2) | 2.4 (61) 8% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 94.89 (2410.23) | 102.44 (2601.87) | 7.54 (191.64) 8% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 4.8 (122) | 1.2 (30.5) 33.3% |
| Revolutions per mile (km) | 667.71 (414.9) | 618.53 (384.34) | -49.18 (-30.56) -7.4% |
305/40-23 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.59 mph (34.75 km/h) |
| 25 mph (40.23 km/h) | 26.99 mph (43.43 km/h) |
| 30 mph (48.28 km/h) | 32.39 mph (52.12 km/h) |
| 35 mph (56.33 km/h) | 37.78 mph (60.81 km/h) |
| 40 mph (64.37 km/h) | 43.18 mph (69.49 km/h) |
| 45 mph (72.42 km/h) | 48.58 mph (78.18 km/h) |
| 50 mph (80.47 km/h) | 53.98 mph (86.87 km/h) |
| 55 mph (88.51 km/h) | 59.37 mph (95.55 km/h) |
| 60 mph (96.56 km/h) | 64.77 mph (104.24 km/h) |
| 65 mph (104.61 km/h) | 70.17 mph (112.92 km/h) |
| 70 mph (112.65 km/h) | 75.57 mph (121.61 km/h) |
| 75 mph (120.7 km/h) | 80.96 mph (130.3 km/h) |
| 80 mph (128.75 km/h) | 86.36 mph (138.98 km/h) |
| 85 mph (136.79 km/h) | 91.76 mph (147.67 km/h) |
| 90 mph (144.84 km/h) | 97.16 mph (156.36 km/h) |
| 95 mph (152.89 km/h) | 102.55 mph (165.04 km/h) |
| 100 mph (160.93 km/h) | 107.95 mph (173.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1574 | 1829 | 1969 | 2056 | 2150 | 2217 | 2291 | 2378 | 2498 | 2619 | 2753 | 2860 | 3054 | 3269 | 3436 | 3543 | 3604 | 3825 | 4133 | 4803 |
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