Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 385/55-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 39.67 (1007.7) | 7.07 (179.5) 21.7% |
| Width inches (mm) | 12.01 (305) | 15.16 (385) | 3.15 (80) 26.2% |
| Circum. inches (mm) | 102.44 (2601.87) | 124.64 (3165.78) | 22.2 (563.92) 21.7% |
| Sidewall Height inches (mm) | 4.8 (122) | 8.34 (211.75) | 3.53 (89.75) 73.6% |
| Revolutions per mile (km) | 618.53 (384.34) | 508.36 (315.88) | -110.18 (-68.46) -17.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.33 mph (39.16 km/h) |
| 25 mph (40.23 km/h) | 30.42 mph (48.95 km/h) |
| 30 mph (48.28 km/h) | 36.5 mph (58.74 km/h) |
| 35 mph (56.33 km/h) | 42.59 mph (68.54 km/h) |
| 40 mph (64.37 km/h) | 48.67 mph (78.33 km/h) |
| 45 mph (72.42 km/h) | 54.75 mph (88.12 km/h) |
| 50 mph (80.47 km/h) | 60.84 mph (97.91 km/h) |
| 55 mph (88.51 km/h) | 66.92 mph (107.7 km/h) |
| 60 mph (96.56 km/h) | 73 mph (117.49 km/h) |
| 65 mph (104.61 km/h) | 79.09 mph (127.28 km/h) |
| 70 mph (112.65 km/h) | 85.17 mph (137.07 km/h) |
| 75 mph (120.7 km/h) | 91.26 mph (146.86 km/h) |
| 80 mph (128.75 km/h) | 97.34 mph (156.65 km/h) |
| 85 mph (136.79 km/h) | 103.42 mph (166.44 km/h) |
| 90 mph (144.84 km/h) | 109.51 mph (176.23 km/h) |
| 95 mph (152.89 km/h) | 115.59 mph (186.02 km/h) |
| 100 mph (160.93 km/h) | 121.67 mph (195.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1294 | 1503 | 1618 | 1690 | 1767 | 1822 | 1883 | 1954 | 2053 | 2152 | 2263 | 2351 | 2510 | 2686 | 2824 | 2912 | 2962 | 3143 | 3397 | 3947 |
Better Fuel Economy Factory Ratios Increased Power
