My G35 has 350Z springs and struts (gave it a 1" drop) and Hotchkis anti-roll bars. And I'm running 235/50/17 tires on it. OEM is 215/55/17 so the 235s gave me a full inch more width but have the same diameter so my speedometer is still dead on.
I have 16" RSX wheels on my Accord (its an '04) because they are ridiculously easy to clean and pretty light. About 16 lb a wheel. 215/55/16 tires which are just a bit shorter than OEM so my speedometer is 1.5 mph fast at 60 mpg. But with the offset of the RSX wheels, 225/55/16 tires (which would have kept the speedometer accurate) rubbed slightly on the wheel well so had to go one size smaller. Accord suspension has stock springs, Koni yellow struts on the lower spring perch (about a 1/2' drop), a TL-S front anti-roll bar and Progress 24 mm rear bar. The struts definitely firmed up the ride but overall with the softer springs and taller profile tires it rides better than my G35.
I was really happy with Goodyear Eagle Sport A/S tires on both cars but they no longer make them in my size on the Accord and the Continental DWS tires wore out in 22,000 miles so I now have Firestone Firehawk tires. Decent tire, good grip but a touch heavy. I've got Continental DWS on the G35. The Goodyear tires on the G35 had no issues dealing with a surprise snow storm heading to Vegas a few years ago. They had over 30k miles on them at the time. Since mine is a 6 speed, it does have limited slip which also helps. The DWS on the Accord were outstanding in the snow we had in the Dallas area in 2021. But on both cars, I was getting more than 40,000 miles out of the Goodyear Eagles so that was a huge plus.
Additional wheel/tire width improves grip. Adding additional wheel width (within reason) with the same size tire keeps the sidewall from being pulled in further on a narrower wheel.
