This site has a bunch of useful calculators and comparison tools. On the chart, when you click on a size you will get detailed specs for that size including wheel width requirmement and a pretty complete list of who makes tires in that size. I've found it to be very helpful as I try to decide what to go with. In 14" the biggest you'll find new is 245-60 and you get BFG Radial TA. 15" has a much better selection.
https://tiresize.com/chart/