* Existing Wheel Size: What size wheels are currently on your truck? Larger tires require larger wheels. Check the size stamped on the wheel itself (e.g., 15x7, 16x8).
* Wheel Well Clearance: Even with larger wheels, the tires can't rub against the fenders, suspension components, or body. Larger tires will extend further outwards and upwards. You'll need to physically check for clearance, perhaps even test-fitting a tire before purchasing.
* Speedometer Calibration: Larger tires will affect your speedometer's accuracy. Significant increases in tire diameter will result in under-reading your speed, potentially affecting safety. A speedometer calibrator or reprogramming may be necessary.
* Gear Ratio: Larger tires effectively lower your gear ratio, which can impact acceleration and fuel economy.
* Rubbing: This is a major concern. Tires rubbing will damage your tires and truck body.
To find the largest suitable tire size:
1. Identify your current tire size: This information is usually found on the sidewall of your current tire (e.g., P235/75R15).
2. Research online: Many online forums (like Dodge truck forums) dedicated to your specific model year will have discussions on tire upgrades, and users will often share what sizes work without modifications.
3. Consult a tire professional: A tire shop specializing in trucks can assess your truck and suggest appropriate sizes based on your truck's specifics and wheel well clearance. They are the best resource to avoid problems.
4. Consider a slight increase: Start with a small increase in tire size (e.g., going up an inch or two in diameter) to minimize potential problems.
In short: Don't just guess. Research your specific truck, and consult professionals to avoid problems. Trying to fit tires that are too large can lead to rubbing, speedometer inaccuracy, handling issues, and potentially damage to your truck.
