I have a 2004 Honda Accord 3.0 V6 and I have recently got a
set of 17-inch Honda rims that came off of a 2012 and I
wanted to know what's the biggest size tire I can put on there
to get my luxury ride out of the car and not the sport ride and
I think the room is a 8 inch rim
Darian: Go here and put in your existing and new (intended) package for the 17" rims and various tire sizes for width & section.... https://www.willtheyfit.com/
Taller sidewall tires will generally ride softer. Low profile tires will give better handling but a firmer ride.