Join Date: Feb 2012
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My last car had 17" alloy wheels and low profile tires. I bent several rims and blew out 4-5 tires over 10 years. When you hit a bump in the road it was very jarring.
I was concerned about the Challenger having the same issue, but it doesn't seem to. Even with the 20" wheels, the sidewalls are much taller than my last car. Bumps and potholes are much better as well.
Practically speaking, the 18" wheels would ride more softly and be cheaper to buy and replace. I really liked the looks of the 20" so I got those and a road hazard warranty for 5 years to cover any blow outs.
If you can test drive both, I'd try it for yourself. Your idea of soft or smooth may be different than mine.