Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 290/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 35.98 (914) | 3.38 (85.8) 10.4% |
| Width inches (mm) | 12.01 (305) | 11.42 (290) | -0.59 (-15) -4.9% |
| Circum. inches (mm) | 102.44 (2601.87) | 113.05 (2871.42) | 10.61 (269.55) 10.4% |
| Sidewall Height inches (mm) | 4.8 (122) | 7.99 (203) | 3.19 (81) 66.4% |
| Revolutions per mile (km) | 618.53 (384.34) | 560.47 (348.26) | -58.06 (-36.08) -9.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.07 mph (35.52 km/h) |
| 25 mph (40.23 km/h) | 27.59 mph (44.4 km/h) |
| 30 mph (48.28 km/h) | 33.11 mph (53.28 km/h) |
| 35 mph (56.33 km/h) | 38.63 mph (62.16 km/h) |
| 40 mph (64.37 km/h) | 44.14 mph (71.04 km/h) |
| 45 mph (72.42 km/h) | 49.66 mph (79.92 km/h) |
| 50 mph (80.47 km/h) | 55.18 mph (88.8 km/h) |
| 55 mph (88.51 km/h) | 60.7 mph (97.68 km/h) |
| 60 mph (96.56 km/h) | 66.22 mph (106.56 km/h) |
| 65 mph (104.61 km/h) | 71.73 mph (115.44 km/h) |
| 70 mph (112.65 km/h) | 77.25 mph (124.33 km/h) |
| 75 mph (120.7 km/h) | 82.77 mph (133.21 km/h) |
| 80 mph (128.75 km/h) | 88.29 mph (142.09 km/h) |
| 85 mph (136.79 km/h) | 93.81 mph (150.97 km/h) |
| 90 mph (144.84 km/h) | 99.32 mph (159.85 km/h) |
| 95 mph (152.89 km/h) | 104.84 mph (168.73 km/h) |
| 100 mph (160.93 km/h) | 110.36 mph (177.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1426 | 1657 | 1784 | 1863 | 1948 | 2009 | 2076 | 2155 | 2264 | 2373 | 2494 | 2592 | 2768 | 2962 | 3114 | 3211 | 3265 | 3466 | 3745 | 4352 |
Better Fuel Economy Factory Ratios Increased Power
