Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-17 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.76 (679.8) | 29.1 (739.2) | 2.34 (59.4) 8.7% |
| Width inches (mm) | 6.1 (155) | 9.25 (235) | 3.15 (80) 51.6% |
| Circum. inches (mm) | 84.08 (2135.65) | 91.43 (2322.27) | 7.35 (186.61) 8.7% |
| Sidewall Height inches (mm) | 4.88 (124) | 5.55 (141) | 0.67 (17) 13.7% |
| Revolutions per mile (km) | 753.56 (468.24) | 693.01 (430.61) | -60.55 (-37.63) -8% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.75 mph (35 km/h) |
| 25 mph (40.23 km/h) | 27.18 mph (43.75 km/h) |
| 30 mph (48.28 km/h) | 32.62 mph (52.5 km/h) |
| 35 mph (56.33 km/h) | 38.06 mph (61.25 km/h) |
| 40 mph (64.37 km/h) | 43.5 mph (70 km/h) |
| 45 mph (72.42 km/h) | 48.93 mph (78.75 km/h) |
| 50 mph (80.47 km/h) | 54.37 mph (87.5 km/h) |
| 55 mph (88.51 km/h) | 59.81 mph (96.25 km/h) |
| 60 mph (96.56 km/h) | 65.24 mph (105 km/h) |
| 65 mph (104.61 km/h) | 70.68 mph (113.75 km/h) |
| 70 mph (112.65 km/h) | 76.12 mph (122.5 km/h) |
| 75 mph (120.7 km/h) | 81.55 mph (131.25 km/h) |
| 80 mph (128.75 km/h) | 86.99 mph (140 km/h) |
| 85 mph (136.79 km/h) | 92.43 mph (148.75 km/h) |
| 90 mph (144.84 km/h) | 97.86 mph (157.5 km/h) |
| 95 mph (152.89 km/h) | 103.3 mph (166.25 km/h) |
| 100 mph (160.93 km/h) | 108.74 mph (175 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1764 | 2049 | 2206 | 2304 | 2409 | 2484 | 2567 | 2664 | 2799 | 2934 | 3084 | 3204 | 3422 | 3662 | 3850 | 3970 | 4037 | 4285 | 4630 | 5381 |
Better Fuel Economy Factory Ratios Increased Power
