Tire size for easy steering

How easy does it need to steer?

I mean, I run 275/35/18’s up front, with +6.5° of caster, and 16:1 manual steering. Been running the car like that for years, daily driving it most of the year.

Is it easy to parallel park? No, not at all, but I’ve done it. I get groceries and run errands in it every week, so it sees plenty of parking lots.

I will say that a roller bearing idler makes a pretty big difference, you can get one of those from @BergmanAutoCraft for most models. That made a very noticeable difference.

Beyond that, make sure your alignment is set correctly, you’re running the appropriate amount of air in your tires, and all of your bushings, ball joints, tie rod ends etc are in good condition and free of any binding.