My s2k is bone stock, I guess I shouldn't have any problem with the 18s than right!!

 

18s = rim size
What matters is sidewall.

 

What should be the perfect size which does not interfere with side walls?

 

Side walls are the "height" of the sides on the tires. It's impossible to give you a sidewall size suggestion without knowing the width of the tire, since sidewall size is a percentage of the width.

Read the wheels/tires subforum and there's a thread detailing how to pick the appropriate size tire and wheels.

 

Lol, holy thread jack. But yea, they're just OEM AP2 ver.1 wheels powdercoated black. I would've preferred the original silver they usually are in, but these came with the car.

 

Shite sorry man, really you would have preferred the silver ones! I like them the way they are, anyways have fun.

 

Haha, no worries man. Thanks!

 

I never would've thought just changing out the fluids would make such a difference. My car feels so much better now! Shifts are smoother, drivetrain is quieter. And as for the 50/50 mix of Honda mtf and Amsoil blend, so far its working like a charm. Here's hoping it stays that way!

 

Did you change all the fluids? Dealership? What was the price tag to change all the fluids? I'm curious becoz I wanna get this done too.

 

I changed the brake, manual trans, and diff fluid. I have a buddy that works at a local Honda dealership. He usually hooks me up with a good deal. I bought all the fluids myself, it was about $30, and my bud charged me $30 labor to change everything out. So it came to $60 total. I'm not sure how much that would all cost at a dealership normally. However, DO NOT let Honda change out the differential fluid with their factory Honda stuff, it's not meant for the S2000 and will damage the differential.