Yes, you can install different size tires on your car, but it is a decision that requires careful consideration. The most critical factor is staying within a total diameter variance of 3% compared to your car's original equipment (OE) tire size. Straying beyond this can negatively affect your speedometer accuracy, anti-lock braking system (ABS), traction control, and even cause tire rubbing against the wheel well.
The primary reason for changing tire size is to alter the vehicle's performance or appearance. A common modification is "plus-sizing," where you install larger diameter wheels with lower-profile tires to maintain the overall diameter. This can improve cornering response and aesthetics. Conversely, some drivers of off-road vehicles or trucks might install larger overall diameter tires to gain ground clearance.
The following table outlines common scenarios and their implications:
| Modification Type | Typical Size Change | Key Considerations | Potential Impact |
|---|
| Plus Sizing (Performance) | e.g., 225/55R17 → 245/45R18 | Maintains overall diameter. | Sharper handling, firmer ride, increased cost. |
| Off-Road / All-Terrain | e.g., 265/65R17 → 285/70R17 | Increases overall diameter and width. | Better ground clearance, possible need for suspension lift, MPG decrease. |
| Winter Tire Fitment | Often uses narrower, smaller diameter tires. | Must clear brake calipers; check manufacturer approval. | Improved traction on snow/ice, potentially cheaper. |
| Staggered Fitment (RWD Sports) | Wider tires on rear axle. | Must match rolling diameter front/rear to preserve AWD systems. | Enhanced rear grip for acceleration, potential for overseer. |
Before making any change, consult your vehicle's owner's manual for approved alternate sizes. The best practice is to use an online tire size calculator to compare your OE tire's diameter, width, and sidewall height to the new proposed size. Ultimately, for safety and performance, it's highly recommended to have new tires installed and aligned by a professional who can ensure the new setup is compatible with your specific vehicle.
