Ok, I know many of you guys may think i'm stupid for asking this but I know jack crap about cars. Would 285/35/18 in back 245/35/18 in front fit directly onto a Z or would I need any spacers? Again bear in mind I know nothing about cars. Thank you in advance for your replies. Oh, reason I am asking is I have found some TSW Thruxtons for a great deal and was curious if they would fit my Z.

 

It's the offset of the wheels and not the tire size that will determine if you need to rock a spacer. As far as the tire is concerned you should have no problems using those sizes.

 

It'll work. And Nismo^^ is right. I'm running 255/35/19 and 285/35/19 on the '04 car is not lowered, should not make a difference.

 

What are the offset and wheel width of the TSWs? The tires you are asking about are fine if put onto a wheel fitted for a 350z.

 

Tire size doesn't matter. What are the rim specs... width, offset?

 

I would go for 40 sidewall, NOT 35 if using 18s.. unles you plan to drop, which it doesn't sound like. But different tire sizing AND dependent on the wheels specs.