Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-21 | 265/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.03 (737.4) | 28.3 (718.9) | -0.73 (-18.5) -2.5% |
| Width inches (mm) | 10.04 (255) | 10.43 (265) | 0.39 (10) 3.9% |
| Circum. inches (mm) | 91.21 (2316.61) | 88.92 (2258.49) | -2.29 (-58.12) -2.5% |
| Sidewall Height inches (mm) | 4.02 (102) | 3.65 (92.75) | -0.36 (-9.25) -9.1% |
| Revolutions per mile (km) | 694.7 (431.66) | 712.57 (442.77) | 17.88 (11.11) 2.6% |
265/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.5 mph (31.38 km/h) |
| 25 mph (40.23 km/h) | 24.37 mph (39.22 km/h) |
| 30 mph (48.28 km/h) | 29.25 mph (47.07 km/h) |
| 35 mph (56.33 km/h) | 34.12 mph (54.91 km/h) |
| 40 mph (64.37 km/h) | 39 mph (62.76 km/h) |
| 45 mph (72.42 km/h) | 43.87 mph (70.6 km/h) |
| 50 mph (80.47 km/h) | 48.75 mph (78.45 km/h) |
| 55 mph (88.51 km/h) | 53.62 mph (86.29 km/h) |
| 60 mph (96.56 km/h) | 58.49 mph (94.14 km/h) |
| 65 mph (104.61 km/h) | 63.37 mph (101.98 km/h) |
| 70 mph (112.65 km/h) | 68.24 mph (109.83 km/h) |
| 75 mph (120.7 km/h) | 73.12 mph (117.67 km/h) |
| 80 mph (128.75 km/h) | 77.99 mph (125.52 km/h) |
| 85 mph (136.79 km/h) | 82.87 mph (133.36 km/h) |
| 90 mph (144.84 km/h) | 87.74 mph (141.21 km/h) |
| 95 mph (152.89 km/h) | 92.62 mph (149.05 km/h) |
| 100 mph (160.93 km/h) | 97.49 mph (156.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1813 | 2107 | 2269 | 2369 | 2477 | 2554 | 2639 | 2739 | 2878 | 3017 | 3171 | 3295 | 3519 | 3766 | 3959 | 4082 | 4151 | 4406 | 4761 | 5533 |
Better Fuel Economy Factory Ratios Increased Power
