The 20" wheel option for retail AWD cars can only be considered an aesthetic improvement, as you certainly do not want wider tires on snow and ice.
The rest of the article is useless. Here's a breakdown of AWD rim and tire size by model and year:
Retail Models:
2005 - 2010 Chrysler 300 AWD LX: 18x7.5 aluminum, 225/60/18 tires
2011 - 2019 Chrysler 300 AWD LD: 19x7.5 aluminum, 235/55/19 tires
2005 - 2008 Dodge Magnum AWD LX: 18x7.5 aluminum, 225/60/18 tires
2006 - 2010 Dodge Charger AWD LX: 18x7.5 aluminum, 225/60/18 tires
2011 - 2014.5 Dodge Charger AWD LD: 19x7.5 aluminum, 235/55/19 tires
2017 - 2019 Dodge Challenger AWD LA: 19x7.5 aluminum, 235/55/19 tires
Fleet Models:
2014.5 - 2021 Dodge Charger Pursuit LD: 18x7.5 steel, 225/60/18 or 245/55/18 tires
Notes:
- Retail models include both V6 and V8 trims through 2019
- Retail V8 AWD models were discontinued in mid-2014 (Dec of 2013)
- No Police or Pursuit model was ever offered from Chrysler Fleet with AWD prior to mid-2014.
- The AWD Charger Pursuit first went into production in January of 2014, some as early 2015's with the early LD body (go figure)
- The V8-AWD Charger Pursuit was discontinued after the very short 2020 model year run (Nov 2019).
- The V6-AWD Charger Pursuit first came to life at Brampton on November 9, 2020.