Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/35-21 | 285/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.3 (718.9) | 27.73 (704.4) | -0.57 (-14.5) -2% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 88.92 (2258.49) | 87.12 (2212.94) | -1.79 (-45.55) -2% |
| Sidewall Height inches (mm) | 3.65 (92.75) | 3.37 (85.5) | -0.29 (-7.25) -7.8% |
| Revolutions per mile (km) | 712.57 (442.77) | 727.24 (451.89) | 14.67 (9.11) 2.1% |
285/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.6 mph (31.54 km/h) |
| 25 mph (40.23 km/h) | 24.5 mph (39.42 km/h) |
| 30 mph (48.28 km/h) | 29.39 mph (47.31 km/h) |
| 35 mph (56.33 km/h) | 34.29 mph (55.19 km/h) |
| 40 mph (64.37 km/h) | 39.19 mph (63.08 km/h) |
| 45 mph (72.42 km/h) | 44.09 mph (70.96 km/h) |
| 50 mph (80.47 km/h) | 48.99 mph (78.84 km/h) |
| 55 mph (88.51 km/h) | 53.89 mph (86.73 km/h) |
| 60 mph (96.56 km/h) | 58.79 mph (94.61 km/h) |
| 65 mph (104.61 km/h) | 63.69 mph (102.5 km/h) |
| 70 mph (112.65 km/h) | 68.59 mph (110.38 km/h) |
| 75 mph (120.7 km/h) | 73.49 mph (118.27 km/h) |
| 80 mph (128.75 km/h) | 78.39 mph (126.15 km/h) |
| 85 mph (136.79 km/h) | 83.29 mph (134.04 km/h) |
| 90 mph (144.84 km/h) | 88.18 mph (141.92 km/h) |
| 95 mph (152.89 km/h) | 93.08 mph (149.8 km/h) |
| 100 mph (160.93 km/h) | 97.98 mph (157.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1851 | 2150 | 2315 | 2418 | 2528 | 2607 | 2693 | 2796 | 2937 | 3079 | 3237 | 3363 | 3591 | 3843 | 4040 | 4166 | 4237 | 4497 | 4859 | 5647 |
Better Fuel Economy Factory Ratios Increased Power
