Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 26/8-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 25.99 (660.2) | -1.93 (-49) -6.9% |
| Width inches (mm) | 7.09 (180) | 7.99 (203) | 0.91 (23) 12.8% |
| Circum. inches (mm) | 87.72 (2228.02) | 81.66 (2074.08) | -6.06 (-153.94) -6.9% |
| Sidewall Height inches (mm) | 4.96 (126) | 4 (101.5) | -0.96 (-24.5) -19.4% |
| Revolutions per mile (km) | 722.32 (448.83) | 775.93 (482.14) | 53.61 (33.31) 7.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.62 mph (29.96 km/h) |
| 25 mph (40.23 km/h) | 23.27 mph (37.45 km/h) |
| 30 mph (48.28 km/h) | 27.93 mph (44.94 km/h) |
| 35 mph (56.33 km/h) | 32.58 mph (52.44 km/h) |
| 40 mph (64.37 km/h) | 37.24 mph (59.93 km/h) |
| 45 mph (72.42 km/h) | 41.89 mph (67.42 km/h) |
| 50 mph (80.47 km/h) | 46.55 mph (74.91 km/h) |
| 55 mph (88.51 km/h) | 51.2 mph (82.4 km/h) |
| 60 mph (96.56 km/h) | 55.85 mph (89.89 km/h) |
| 65 mph (104.61 km/h) | 60.51 mph (97.38 km/h) |
| 70 mph (112.65 km/h) | 65.16 mph (104.87 km/h) |
| 75 mph (120.7 km/h) | 69.82 mph (112.36 km/h) |
| 80 mph (128.75 km/h) | 74.47 mph (119.85 km/h) |
| 85 mph (136.79 km/h) | 79.13 mph (127.34 km/h) |
| 90 mph (144.84 km/h) | 83.78 mph (134.83 km/h) |
| 95 mph (152.89 km/h) | 88.44 mph (142.32 km/h) |
| 100 mph (160.93 km/h) | 93.09 mph (149.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975 | 2294 | 2470 | 2580 | 2697 | 2781 | 2874 | 2983 | 3134 | 3285 | 3453 | 3588 | 3832 | 4100 | 4311 | 4445 | 4521 | 4798 | 5184 | 6025 |
Better Fuel Economy Factory Ratios Increased Power
