I'm currently still on winter 18"s - Blizzak LM22's and there is DEFINETLY a huge comfort factor on these than the 20" Diamairs (sport suspension).

Lower profile stiffer sidewalls - IMO, bent wheels and flats are more common on 20"s. Bent wheels are dependant on what wheels they are *forged, design, etc* and also flats ------it's just the very nature of wider tires. They tend to pick up more junk off the roads or the front's pick it up, *kick* it back towards the rears and the rear is more common to getting nails, etc.

With that said, it's the small price to pay but I do enjoy driving with 20's on NYC roads.