Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 290/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 34.84 (885) | 2.24 (56.8) 6.9% |
| Width inches (mm) | 12.01 (305) | 11.42 (290) | -0.59 (-15) -4.9% |
| Circum. inches (mm) | 102.44 (2601.87) | 109.46 (2780.31) | 7.03 (178.44) 6.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 7.42 (188.5) | 2.62 (66.5) 54.5% |
| Revolutions per mile (km) | 618.53 (384.34) | 578.84 (359.67) | -39.7 (-24.67) -6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.37 mph (34.39 km/h) |
| 25 mph (40.23 km/h) | 26.71 mph (42.99 km/h) |
| 30 mph (48.28 km/h) | 32.06 mph (51.59 km/h) |
| 35 mph (56.33 km/h) | 37.4 mph (60.19 km/h) |
| 40 mph (64.37 km/h) | 42.74 mph (68.79 km/h) |
| 45 mph (72.42 km/h) | 48.09 mph (77.39 km/h) |
| 50 mph (80.47 km/h) | 53.43 mph (85.99 km/h) |
| 55 mph (88.51 km/h) | 58.77 mph (94.58 km/h) |
| 60 mph (96.56 km/h) | 64.11 mph (103.18 km/h) |
| 65 mph (104.61 km/h) | 69.46 mph (111.78 km/h) |
| 70 mph (112.65 km/h) | 74.8 mph (120.38 km/h) |
| 75 mph (120.7 km/h) | 80.14 mph (128.98 km/h) |
| 80 mph (128.75 km/h) | 85.49 mph (137.58 km/h) |
| 85 mph (136.79 km/h) | 90.83 mph (146.18 km/h) |
| 90 mph (144.84 km/h) | 96.17 mph (154.77 km/h) |
| 95 mph (152.89 km/h) | 101.52 mph (163.37 km/h) |
| 100 mph (160.93 km/h) | 106.86 mph (171.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1473 | 1711 | 1843 | 1924 | 2012 | 2075 | 2144 | 2225 | 2338 | 2451 | 2576 | 2677 | 2858 | 3059 | 3216 | 3316 | 3372 | 3579 | 3867 | 4494 |
Better Fuel Economy Factory Ratios Increased Power
