Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 235/30-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 28.55 (725.2) | -4.06 (-103) -12.4% |
| Width inches (mm) | 12.01 (305) | 9.25 (235) | -2.76 (-70) -23% |
| Circum. inches (mm) | 102.44 (2601.87) | 89.7 (2278.28) | -12.74 (-323.58) -12.4% |
| Sidewall Height inches (mm) | 4.8 (122) | 2.78 (70.5) | -2.03 (-51.5) -42.2% |
| Revolutions per mile (km) | 618.53 (384.34) | 706.38 (438.93) | 87.85 (54.59) 14.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.51 mph (28.18 km/h) |
| 25 mph (40.23 km/h) | 21.89 mph (35.23 km/h) |
| 30 mph (48.28 km/h) | 26.27 mph (42.28 km/h) |
| 35 mph (56.33 km/h) | 30.65 mph (49.32 km/h) |
| 40 mph (64.37 km/h) | 35.03 mph (56.37 km/h) |
| 45 mph (72.42 km/h) | 39.4 mph (63.41 km/h) |
| 50 mph (80.47 km/h) | 43.78 mph (70.46 km/h) |
| 55 mph (88.51 km/h) | 48.16 mph (77.51 km/h) |
| 60 mph (96.56 km/h) | 52.54 mph (84.55 km/h) |
| 65 mph (104.61 km/h) | 56.92 mph (91.6 km/h) |
| 70 mph (112.65 km/h) | 61.29 mph (98.64 km/h) |
| 75 mph (120.7 km/h) | 65.67 mph (105.69 km/h) |
| 80 mph (128.75 km/h) | 70.05 mph (112.74 km/h) |
| 85 mph (136.79 km/h) | 74.43 mph (119.78 km/h) |
| 90 mph (144.84 km/h) | 78.81 mph (126.83 km/h) |
| 95 mph (152.89 km/h) | 83.19 mph (133.87 km/h) |
| 100 mph (160.93 km/h) | 87.56 mph (140.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1798 | 2088 | 2249 | 2348 | 2455 | 2532 | 2616 | 2716 | 2853 | 2991 | 3144 | 3266 | 3488 | 3733 | 3924 | 4047 | 4115 | 4368 | 4720 | 5485 |
Better Fuel Economy Factory Ratios Increased Power
