Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 29.1 (739.2) | -0.59 (-15) -2% |
| Width inches (mm) | 6.5 (165) | 9.25 (235) | 2.76 (70) 42.4% |
| Circum. inches (mm) | 93.28 (2369.39) | 91.43 (2322.27) | -1.86 (-47.12) -2% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 5.55 (141) | -0.3 (-7.5) -5.1% |
| Revolutions per mile (km) | 679.22 (422.05) | 693.01 (430.61) | 13.78 (8.56) 2% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.6 mph (31.55 km/h) |
| 25 mph (40.23 km/h) | 24.5 mph (39.43 km/h) |
| 30 mph (48.28 km/h) | 29.4 mph (47.32 km/h) |
| 35 mph (56.33 km/h) | 34.3 mph (55.21 km/h) |
| 40 mph (64.37 km/h) | 39.2 mph (63.09 km/h) |
| 45 mph (72.42 km/h) | 44.11 mph (70.98 km/h) |
| 50 mph (80.47 km/h) | 49.01 mph (78.87 km/h) |
| 55 mph (88.51 km/h) | 53.91 mph (86.75 km/h) |
| 60 mph (96.56 km/h) | 58.81 mph (94.64 km/h) |
| 65 mph (104.61 km/h) | 63.71 mph (102.53 km/h) |
| 70 mph (112.65 km/h) | 68.61 mph (110.41 km/h) |
| 75 mph (120.7 km/h) | 73.51 mph (118.3 km/h) |
| 80 mph (128.75 km/h) | 78.41 mph (126.19 km/h) |
| 85 mph (136.79 km/h) | 83.31 mph (134.07 km/h) |
| 90 mph (144.84 km/h) | 88.21 mph (141.96 km/h) |
| 95 mph (152.89 km/h) | 93.11 mph (149.85 km/h) |
| 100 mph (160.93 km/h) | 98.01 mph (157.73 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 |
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