Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-21 | 235/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.4) | 27.48 (697.9) | 0.69 (17.5) 2.6% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 84.16 (2137.54) | 86.32 (2192.52) | 2.16 (54.98) 2.6% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 3.24 (82.25) | 0.34 (8.75) 11.9% |
| Revolutions per mile (km) | 752.9 (467.83) | 734.02 (456.1) | -18.88 (-11.73) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33.01 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.27 km/h) |
| 30 mph (48.28 km/h) | 30.77 mph (49.52 km/h) |
| 35 mph (56.33 km/h) | 35.9 mph (57.78 km/h) |
| 40 mph (64.37 km/h) | 41.03 mph (66.03 km/h) |
| 45 mph (72.42 km/h) | 46.16 mph (74.28 km/h) |
| 50 mph (80.47 km/h) | 51.29 mph (82.54 km/h) |
| 55 mph (88.51 km/h) | 56.41 mph (90.79 km/h) |
| 60 mph (96.56 km/h) | 61.54 mph (99.04 km/h) |
| 65 mph (104.61 km/h) | 66.67 mph (107.3 km/h) |
| 70 mph (112.65 km/h) | 71.8 mph (115.55 km/h) |
| 75 mph (120.7 km/h) | 76.93 mph (123.81 km/h) |
| 80 mph (128.75 km/h) | 82.06 mph (132.06 km/h) |
| 85 mph (136.79 km/h) | 87.19 mph (140.31 km/h) |
| 90 mph (144.84 km/h) | 92.31 mph (148.57 km/h) |
| 95 mph (152.89 km/h) | 97.44 mph (156.82 km/h) |
| 100 mph (160.93 km/h) | 102.57 mph (165.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1868 | 2170 | 2337 | 2440 | 2552 | 2631 | 2718 | 2822 | 2965 | 3108 | 3267 | 3394 | 3625 | 3879 | 4078 | 4205 | 4276 | 4539 | 4904 | 5699 |
Better Fuel Economy Factory Ratios Increased Power
