Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 255/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 28.04 (712.2) | 2.6 (66) 10.2% |
| Width inches (mm) | 5.31 (135) | 10.04 (255) | 4.72 (120) 88.9% |
| Circum. inches (mm) | 79.93 (2030.1) | 88.09 (2237.44) | 8.16 (207.35) 10.2% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 5.02 (127.5) | 1.3 (33) 34.9% |
| Revolutions per mile (km) | 792.74 (492.59) | 719.28 (446.94) | -73.46 (-45.65) -9.3% |
255/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.04 mph (35.47 km/h) |
| 25 mph (40.23 km/h) | 27.55 mph (44.34 km/h) |
| 30 mph (48.28 km/h) | 33.06 mph (53.21 km/h) |
| 35 mph (56.33 km/h) | 38.57 mph (62.08 km/h) |
| 40 mph (64.37 km/h) | 44.09 mph (70.95 km/h) |
| 45 mph (72.42 km/h) | 49.6 mph (79.82 km/h) |
| 50 mph (80.47 km/h) | 55.11 mph (88.69 km/h) |
| 55 mph (88.51 km/h) | 60.62 mph (97.55 km/h) |
| 60 mph (96.56 km/h) | 66.13 mph (106.42 km/h) |
| 65 mph (104.61 km/h) | 71.64 mph (115.29 km/h) |
| 70 mph (112.65 km/h) | 77.15 mph (124.16 km/h) |
| 75 mph (120.7 km/h) | 82.66 mph (133.03 km/h) |
| 80 mph (128.75 km/h) | 88.17 mph (141.9 km/h) |
| 85 mph (136.79 km/h) | 93.68 mph (150.77 km/h) |
| 90 mph (144.84 km/h) | 99.19 mph (159.63 km/h) |
| 95 mph (152.89 km/h) | 104.7 mph (168.5 km/h) |
| 100 mph (160.93 km/h) | 110.21 mph (177.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1830 | 2126 | 2290 | 2391 | 2500 | 2578 | 2664 | 2765 | 2905 | 3046 | 3201 | 3326 | 3552 | 3801 | 3996 | 4120 | 4191 | 4448 | 4806 | 5585 |
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