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I just bought my wife a new 4x4 Navigator. I am thinking about putting 20" or 22" wheels on it, but I heard that the ride and/or handling suffers at high speeds (70 mph+) with larger wheels. Does anyone have any experience with these size wheels? And spare me the lecture about street trucks - I have a nice F150 4x4 I use for my dirt bike that sees plenty of off road action. The Navigator is my WIFE's. And besides, the stock wheels are not much to look at and she doesn't want to drive some manly beast.
If you are referring to low profile, rubber band looking tires, then yes, they do ride rough. There ain't enough sidewall to provide any cushion on bumps in the road. And hit a pothole right you'll be looking for someone to straighten the rim or have to buy another to replace it.
Well I certainly don't want thin walled tires. I have a 911 with tires that are low profile and the ride is rough, but the handling is great. I was thinking about a 305/45/22 tire. I saw one on a truck in a parking lot and the sidewall looked to be at least 5" or 6" high. Its not an off-road tire, but that seemed ok for the street - I am not lowering the truck or anything stupid like that, so I have the room to put large tires on it.
I guess it's a matter of "the Look." Large diameter shiny wheels with wide "rubber band" tires are currently in fashion in some circles. Elsewhere, tall tires, with lots of rubber showing are still acceptable.
If we're looking for high lateral G skidpad figures from a 911 or Corvette, we'll see tires with aspect ratios of 45 or even 35.
But if we're looking for a comfortable ride and the security of knowing we can soak up big bumps and won't hydroplane at the tiniest sign of slush, we'll keep width modest and aspect ratios high.
My wife has been happy for years, with 265/75-16 radials on her Suburban. I know the new high-end SUV's have pretty impressive suspension, but I see nothing (except appearance) to be gained by running aspect ratios below 65 or 60 on such a vehicle. I'd expect a lady with a Navigator to be less interested in high lateral G figures on dry pavement, than in a comfortable ride and all-weather security.