GL550 wheels
....where should I buy 20" wheels from? and do they need to be oem to keep my cpo intact?
If you want to stick with 21", here is a great and reasonable priced tire option, per Discount tire, this is the best and newest option and tread lasts a long time. I am running this tire and very happy with it. You should be able to get a great deal on Black Friday if you can wait. If you buy them online, then you get free shipping and no tax. Locally DT can install for you.
https://www.discounttiredirect.com/b...s-plus/p/35273
If you want 20", be sure to stick with MB wheels, you should be able to find them in local Craigslist or offerup or Ebay as some folks have upgraded to 21" AMG wheels from the standard 19" or 20" wheels.
BTW, if you downgrade to 20" wheels and tire package, your WILL experience worse handling and cornering, more side to side sway since you will have taller tire side wall and also narrower tires, which gives you less contact with the road.




