Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 360/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 39.84 (1012) | 7.24 (183.8) 22.2% |
| Width inches (mm) | 12.01 (305) | 14.17 (360) | 2.17 (55) 18% |
| Circum. inches (mm) | 102.44 (2601.87) | 125.17 (3179.29) | 22.73 (577.42) 22.2% |
| Sidewall Height inches (mm) | 4.8 (122) | 9.92 (252) | 5.12 (130) 106.6% |
| Revolutions per mile (km) | 618.53 (384.34) | 506.2 (314.53) | -112.34 (-69.8) -18.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.44 mph (39.33 km/h) |
| 25 mph (40.23 km/h) | 30.55 mph (49.16 km/h) |
| 30 mph (48.28 km/h) | 36.66 mph (59 km/h) |
| 35 mph (56.33 km/h) | 42.77 mph (68.83 km/h) |
| 40 mph (64.37 km/h) | 48.88 mph (78.66 km/h) |
| 45 mph (72.42 km/h) | 54.99 mph (88.49 km/h) |
| 50 mph (80.47 km/h) | 61.1 mph (98.33 km/h) |
| 55 mph (88.51 km/h) | 67.21 mph (108.16 km/h) |
| 60 mph (96.56 km/h) | 73.32 mph (117.99 km/h) |
| 65 mph (104.61 km/h) | 79.43 mph (127.82 km/h) |
| 70 mph (112.65 km/h) | 85.53 mph (137.66 km/h) |
| 75 mph (120.7 km/h) | 91.64 mph (147.49 km/h) |
| 80 mph (128.75 km/h) | 97.75 mph (157.32 km/h) |
| 85 mph (136.79 km/h) | 103.86 mph (167.15 km/h) |
| 90 mph (144.84 km/h) | 109.97 mph (176.99 km/h) |
| 95 mph (152.89 km/h) | 116.08 mph (186.82 km/h) |
| 100 mph (160.93 km/h) | 122.19 mph (196.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1288 | 1496 | 1612 | 1683 | 1760 | 1814 | 1875 | 1946 | 2045 | 2143 | 2253 | 2341 | 2500 | 2675 | 2812 | 2900 | 2949 | 3130 | 3382 | 3930 |
Better Fuel Economy Factory Ratios Increased Power
