Aussie skypig

My 2006 CS came from the factory with optional 19” wheels. A previous owner has fitted 18” BBS wheels. Sounds like a good thing!

Tire size.
My front wheels are stock 8” wide. It came with 245/40 tires, 10mm up from stock 235.
The rear wheels are 10” wide and are fitted with stock 265/40.

This doesn’t seem quite “right”.
With the wider rears, and the 3.8 engine fitted I could justify 275/40s on the rear when replacements are required?

Go back to stock? Or stick with one size up on the front? (from what I can find: 235s are “correct” on 8” rims.)

This is my first sports car, and as such - seems GREAT, but I want it to be as good as it can be.
Mainly used carving through the mountain roads.

sectachrome

This might be helpful: https://apexwheels.com/fitment-guide...-fitment-guide

Forgelite Wheels

A 19" setup is more popular and more viable for the 987 platform the setup we recommended is 19x8.5 ET50 with a 235/35/19 tire for the fronts and a 19x10 ET40 with a 265/35/19 for the rears this is a balanced fitment that wont comprise the driving feel

speedyellow70

One other thing to consider: Wheel scrapes from parking against a curb. I have tiny 17" wheels on my 987.2 and they are pristine. The higher side walls of my 17" tires have saved my wheels from scrapes at least a couple of times. For sure I'd love some 18"s but while I'm waiting to save up the funds, I'm appreciating the extra layer of protection as well as the price of smaller tires. Oh yeah, skinny tires are easier to slide (=fun) than 'grippier' fat ones as well. Who knows, I might just stick with my 17's!

Kuro Neko

Good point!
Rough roads are a problem for some of my driving too, and the 18s work better there as well.

Your other point though reminds me of a comment from a professional driver - if you want to be a better driver, get smaller wheels and tires, and learn how to feel and control the car...

KrisA

The real issue with the 17's is that tire selection is extremely limited. The 18" size has a plethora of options, from Cup 2's to performance winters, all seasons, you name it.

XuTVJet

245 width tires on 8 inch wide rims is within tire manufacturer spec. My 2016 BMW M235 came from the factory with 18X8 rims with 245s in the back. 245s give you a little more meat/width which helps protect the rim. 235s will give a little more sharper steering response.

Shark Attack

These are 19's



Sometimes the ride is loud and I feel like I'm on a tricycle with solid-hard rubber wheel going over sidewalk cracks

Aussie skypig

Thanks.
Now I want 9” front rims…..
Doubt I could feel the difference at my level anyway.

Aussie skypig

Thats good news, and makes me feel better.
Probably stick with the 245s and get 275s on the rear when replacement is required.