Recommend Tire Size: Stock 20's

This is INFX35's 275/45/20 on stockers:
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This is my 275/40/20 winter tires on stockers:
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The widest you can go without any adverse affects on handling, ride etc is 275/45/20 and it looks better IMO. 275/40/20 like mine will be small and lower your FX even more. The ride is good but I think the FX needs a bigger tire to fill the gap. I'm lowered on H&Rs and there IS a bigger gap with 275/40s. If you want a thin, stretched sidewall then you can try 265/45/20 but I think the best is 275/45 size
 
This is 275/45/ goodyear eagle gt tires
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This is 285/50 yokohama parada
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i am def going with the 285/50 not that much bulge and nice wide tires i am going to get h&r and 20mm spacer soon.
tires going on next week!

OH me and Nismo Rocket and friend's 350z at irwindale today.
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Ya, you gotta be lowered with the 45s, looks bad otherwise. With the thinner sidewall, the 45s should make you a bit lower too.
 
1) Look at the specs for the stock Goodyear RS-As and find the overall rolling diameter inflated on the wheel.

2) Play with the different tire sizes that you are considering. Look at the spec. You want to keep the rolling diameter as close to stock as possible. The tire itself will tell you max and min wheel width range that the tire is made for.

3) Remember no two tires of the same size will have the same specs. That is why you should look up the actual specs from the tire manufacture's site first.
 
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