Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-18 | 305/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 26.41 (670.7) | 0.37 (9.5) 1.4% |
| Width inches (mm) | 10.04 (255) | 12.01 (305) | 1.97 (50) 19.6% |
| Circum. inches (mm) | 81.78 (2077.22) | 82.96 (2107.07) | 1.18 (29.85) 1.4% |
| Sidewall Height inches (mm) | 4.02 (102) | 4.2 (106.75) | 0.19 (4.75) 4.7% |
| Revolutions per mile (km) | 774.76 (481.41) | 763.78 (474.59) | -10.97 (-6.82) -1.4% |
305/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.29 mph (32.65 km/h) |
| 25 mph (40.23 km/h) | 25.36 mph (40.81 km/h) |
| 30 mph (48.28 km/h) | 30.43 mph (48.97 km/h) |
| 35 mph (56.33 km/h) | 35.5 mph (57.14 km/h) |
| 40 mph (64.37 km/h) | 40.57 mph (65.3 km/h) |
| 45 mph (72.42 km/h) | 45.65 mph (73.46 km/h) |
| 50 mph (80.47 km/h) | 50.72 mph (81.62 km/h) |
| 55 mph (88.51 km/h) | 55.79 mph (89.79 km/h) |
| 60 mph (96.56 km/h) | 60.86 mph (97.95 km/h) |
| 65 mph (104.61 km/h) | 65.93 mph (106.11 km/h) |
| 70 mph (112.65 km/h) | 71.01 mph (114.27 km/h) |
| 75 mph (120.7 km/h) | 76.08 mph (122.44 km/h) |
| 80 mph (128.75 km/h) | 81.15 mph (130.6 km/h) |
| 85 mph (136.79 km/h) | 86.22 mph (138.76 km/h) |
| 90 mph (144.84 km/h) | 91.29 mph (146.92 km/h) |
| 95 mph (152.89 km/h) | 96.36 mph (155.08 km/h) |
| 100 mph (160.93 km/h) | 101.44 mph (163.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1944 | 2258 | 2432 | 2539 | 2655 | 2738 | 2829 | 2936 | 3085 | 3234 | 3399 | 3532 | 3772 | 4036 | 4243 | 4375 | 4450 | 4723 | 5103 | 5930 |
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