Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 29.1 (739.2) | -0.54 (-13.8) -1.8% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 93.13 (2365.62) | 91.43 (2322.27) | -1.71 (-43.35) -1.8% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.55 (141) | 0.73 (18.5) 15.1% |
| Revolutions per mile (km) | 680.31 (422.72) | 693.01 (430.61) | 12.7 (7.89) 1.9% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.63 mph (31.6 km/h) |
| 25 mph (40.23 km/h) | 24.54 mph (39.5 km/h) |
| 30 mph (48.28 km/h) | 29.45 mph (47.4 km/h) |
| 35 mph (56.33 km/h) | 34.36 mph (55.29 km/h) |
| 40 mph (64.37 km/h) | 39.27 mph (63.19 km/h) |
| 45 mph (72.42 km/h) | 44.18 mph (71.09 km/h) |
| 50 mph (80.47 km/h) | 49.08 mph (78.99 km/h) |
| 55 mph (88.51 km/h) | 53.99 mph (86.89 km/h) |
| 60 mph (96.56 km/h) | 58.9 mph (94.79 km/h) |
| 65 mph (104.61 km/h) | 63.81 mph (102.69 km/h) |
| 70 mph (112.65 km/h) | 68.72 mph (110.59 km/h) |
| 75 mph (120.7 km/h) | 73.63 mph (118.49 km/h) |
| 80 mph (128.75 km/h) | 78.53 mph (126.39 km/h) |
| 85 mph (136.79 km/h) | 83.44 mph (134.29 km/h) |
| 90 mph (144.84 km/h) | 88.35 mph (142.19 km/h) |
| 95 mph (152.89 km/h) | 93.26 mph (150.09 km/h) |
| 100 mph (160.93 km/h) | 98.17 mph (157.99 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
