The newer frame HD 2009 and up is different than the older ones. My 2017 RGU has a stock 180/185-16. After a lot of home work I learned a few things.
1. 195/60 R16 is a prefect fit. Works out the the same height so no issues with speed. Wider but no issue. at .59 wider you have some room even if tire lost some air.
2. 205/55 R16 will also fit but lower and wider. While it clears there is no wiggle room.
3. They make car tires that are called wheel/rim savers. They have extra rubber on the side wall curb side to protect fancy wheels. great on a car but they will cause clearance issue if used on the bike.
4. 195/60 R16 are a little less common but you can get them, most places.
I will not get into the debate about Car tires on a non sidecar bike. I did put a 195/60 R16 Hankook OPTIMO H426 on mine. Also used Ride on for balance. It has been on a while and winter riding is great. It will ride through snow the stock tire could not, and works much better on ice. Drive ways I could not get up with stock tire it rides right up. I just returned from a 500 cool ride on dry roads. It was higher speed Highway riding for the most part. The rig handled great.
5. There are two different types of tire out there Symmetrical and Asymmetrical. Symmetrical tires have a tread pattern that is the same across the inner and outer portions of the tire.
Asymmetrical tires have a tread pattern that is different across the width of the tire. When looking at an asymmetrical tire the inner and outer tread patterns will not be the same.
For use with your rig you may wish to stay with Symmetrical tire.
6. This tire calculator may be of use to some. https://www.tacomaworld.com/tirecalc...5r16-195-60r16