Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 235/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 30.95 (786.2) | 1.44 (36.5) 4.9% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 92.73 (2355.25) | 97.24 (2469.92) | 4.51 (114.67) 4.9% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 6.48 (164.5) | 0.72 (18.25) 12.5% |
| Revolutions per mile (km) | 683.3 (424.58) | 651.58 (404.87) | -31.72 (-19.71) -4.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.75 km/h) |
| 25 mph (40.23 km/h) | 26.22 mph (42.19 km/h) |
| 30 mph (48.28 km/h) | 31.46 mph (50.63 km/h) |
| 35 mph (56.33 km/h) | 36.7 mph (59.07 km/h) |
| 40 mph (64.37 km/h) | 41.95 mph (67.51 km/h) |
| 45 mph (72.42 km/h) | 47.19 mph (75.95 km/h) |
| 50 mph (80.47 km/h) | 52.43 mph (84.38 km/h) |
| 55 mph (88.51 km/h) | 57.68 mph (92.82 km/h) |
| 60 mph (96.56 km/h) | 62.92 mph (101.26 km/h) |
| 65 mph (104.61 km/h) | 68.16 mph (109.7 km/h) |
| 70 mph (112.65 km/h) | 73.41 mph (118.14 km/h) |
| 75 mph (120.7 km/h) | 78.65 mph (126.58 km/h) |
| 80 mph (128.75 km/h) | 83.89 mph (135.02 km/h) |
| 85 mph (136.79 km/h) | 89.14 mph (143.45 km/h) |
| 90 mph (144.84 km/h) | 94.38 mph (151.89 km/h) |
| 95 mph (152.89 km/h) | 99.63 mph (160.33 km/h) |
| 100 mph (160.93 km/h) | 104.87 mph (168.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1658 | 1926 | 2074 | 2166 | 2265 | 2336 | 2413 | 2505 | 2632 | 2759 | 2900 | 3013 | 3217 | 3443 | 3620 | 3733 | 3796 | 4029 | 4353 | 5059 |
Better Fuel Economy Factory Ratios Increased Power
