* Tire size: Rim size is inextricably linked to tire size. You can't just slap on huge rims and use any old tire. The overall diameter (rim plus tire) needs to remain relatively close to the stock size to avoid speedometer inaccuracies, rubbing issues, and potential damage to your drivetrain. Larger rims usually mean smaller profile tires to maintain a similar overall diameter.
* Wheel offset: The offset determines how far the wheel sits in or out relative to the hub mounting surface. An incorrect offset can cause the wheels to rub against the suspension, fenders, or brakes. You'll need to find wheels with an appropriate offset for your Chrysler 300C year and model.
* Backspacing: Similar to offset, backspacing dictates how far the wheel's mounting surface is from the back of the rim. Incorrect backspacing will lead to rubbing.
* Brake caliper clearance: Larger rims may not clear your brake calipers. This is a major limiting factor.
* Fender clearance: Even with the right offset and backspacing, excessively wide rims and tires can rub against the fenders, especially during turns or when the suspension compresses. You might need fender rolling or even aftermarket flares to accommodate larger wheels.
In short: While some people have successfully fitted 22-inch rims on a Chrysler 300C, 20 inches is generally considered the practical upper limit without significant modifications. Going beyond that dramatically increases the risk of rubbing, clearance issues, and a harsh ride. Always check wheel specifications against your 300C's specifics and consult a reputable tire and wheel shop to ensure proper fitment. They can help you find the largest size that will work safely and reliably.
