How big an effect will bigger wheels have?

[BobbySpeed]

How big an effect will moving to bigger wheels have? On ride quality I have 18" wheels and am looking at 20" wheels I like.

I don't have an air suspension I have a V6.

Edited March 25, 2015 by BobbySpeed

[grdlaw]

I recently switched from 17 to 20 Inch wheels on my 2008 Cayenne V6. Ride quality is a little more stiff but fine. I have yet to jnstall my H&R lowering springs on my OEM struts, but I'm told that doing so will make the ride more stiff.

Here is a site that will tell you the difference in the speedometer when changing tire sizes. It's a pretty big difference.

http://www.tacomaworld.com/forum/tirecalc.php?tires=235-55r17-275-45r20

[JFP in PA]

How big an effect will moving to bigger wheels have? On ride quality I have 18" wheels and am looking at 20" wheels I like.

I don't have an air suspension I have a V6.

 

As you will most likely be altering the vehicle's tire aspect ratio (http://www.yokohamatire.com/tires_101/reading_your_tire/aspect_ratio/) when you make this type of change, things such as ride height, quality, and steering response will also change in response to the stiffer sidewalls on lower profile tires.

[BobbySpeed]

Cool website, thanks for the url.

The numbers on the tire sizes are wrong. I have 255/55/18 and am looking at 275/40/20. The difference is on average half-a-mile per hour- and you can't even go by that because the comparison tool doesn't compare the same tires.

Obviously the ride Will be stiffer with a shorter side wall, which will in turn provide less flex when cornering, thus improving the performance which is why I'm looking for seat of the pants ride experience. I want to know how much more intense the bumps and potholes are in the 20 inch tire compared to an 18 inch tire in a Cayenne. Thanks for your input.

Edited March 27, 2015 by BobbySpeed

[BobbySpeed]

Putting those H&R springs on the car will theoretically make a bigger difference than changing sidewall height by 2", but hurry up and put them on so you can share your experience!