Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 265/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 32.52 (826) | 6.02 (152.8) 22.7% |
| Width inches (mm) | 5.31 (135) | 10.43 (265) | 5.12 (130) 96.3% |
| Circum. inches (mm) | 83.26 (2114.92) | 102.16 (2594.96) | 18.9 (480.04) 22.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 6.26 (159) | 2.01 (51) 47.2% |
| Revolutions per mile (km) | 760.95 (472.83) | 620.18 (385.36) | -140.77 (-87.47) -18.5% |
265/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.54 mph (39.49 km/h) |
| 25 mph (40.23 km/h) | 30.67 mph (49.37 km/h) |
| 30 mph (48.28 km/h) | 36.81 mph (59.24 km/h) |
| 35 mph (56.33 km/h) | 42.94 mph (69.11 km/h) |
| 40 mph (64.37 km/h) | 49.08 mph (78.99 km/h) |
| 45 mph (72.42 km/h) | 55.21 mph (88.86 km/h) |
| 50 mph (80.47 km/h) | 61.35 mph (98.73 km/h) |
| 55 mph (88.51 km/h) | 67.48 mph (108.6 km/h) |
| 60 mph (96.56 km/h) | 73.62 mph (118.48 km/h) |
| 65 mph (104.61 km/h) | 79.75 mph (128.35 km/h) |
| 70 mph (112.65 km/h) | 85.89 mph (138.22 km/h) |
| 75 mph (120.7 km/h) | 92.02 mph (148.1 km/h) |
| 80 mph (128.75 km/h) | 98.16 mph (157.97 km/h) |
| 85 mph (136.79 km/h) | 104.29 mph (167.84 km/h) |
| 90 mph (144.84 km/h) | 110.43 mph (177.72 km/h) |
| 95 mph (152.89 km/h) | 116.56 mph (187.59 km/h) |
| 100 mph (160.93 km/h) | 122.7 mph (197.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1578 | 1833 | 1974 | 2062 | 2156 | 2223 | 2297 | 2384 | 2505 | 2626 | 2760 | 2868 | 3062 | 3277 | 3445 | 3553 | 3613 | 3835 | 4144 | 4815 |
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