Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 235/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 26.4 (670.6) | -2.57 (-65.3) -8.9% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 91.02 (2311.9) | 82.94 (2106.75) | -8.08 (-205.15) -8.9% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.7 (94) | -0.29 (-7.25) -7.2% |
| Revolutions per mile (km) | 696.11 (432.54) | 763.9 (474.66) | 67.78 (42.12) 9.7% |
235/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.23 mph (29.33 km/h) |
| 25 mph (40.23 km/h) | 22.78 mph (36.66 km/h) |
| 30 mph (48.28 km/h) | 27.34 mph (44 km/h) |
| 35 mph (56.33 km/h) | 31.89 mph (51.33 km/h) |
| 40 mph (64.37 km/h) | 36.45 mph (58.66 km/h) |
| 45 mph (72.42 km/h) | 41.01 mph (65.99 km/h) |
| 50 mph (80.47 km/h) | 45.56 mph (73.33 km/h) |
| 55 mph (88.51 km/h) | 50.12 mph (80.66 km/h) |
| 60 mph (96.56 km/h) | 54.68 mph (87.99 km/h) |
| 65 mph (104.61 km/h) | 59.23 mph (95.33 km/h) |
| 70 mph (112.65 km/h) | 63.79 mph (102.66 km/h) |
| 75 mph (120.7 km/h) | 68.34 mph (109.99 km/h) |
| 80 mph (128.75 km/h) | 72.9 mph (117.32 km/h) |
| 85 mph (136.79 km/h) | 77.46 mph (124.66 km/h) |
| 90 mph (144.84 km/h) | 82.01 mph (131.99 km/h) |
| 95 mph (152.89 km/h) | 86.57 mph (139.32 km/h) |
| 100 mph (160.93 km/h) | 91.13 mph (146.65 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 | 2540 | 2655 | 2738 | 2829 | 2937 | 3086 | 3234 | 3400 | 3532 | 3772 | 4037 | 4244 | 4376 | 4450 | 4723 | 5104 | 5931 |
Better Fuel Economy Factory Ratios Increased Power
