Ispiri FFR6 - Carbon Graphite - Will they fit?

[mr wilks]

Bloody hell, skip that idea then!

Thanks for the heads up - think I'll have a chat with CM wheels or someone who can guide me from the get go.

For Si Z4 as a rule of thumb aim for front 8.5j et 38/42
Rear 9.5j et 35/42
From those numbers a little variation can work but you would need to pay attention to tyre sizes

[Machpb]

Thanks Mr Wilks

[Calps]

For Si Z4 as a rule of thumb aim for front 8.5j et 38/42
Rear 9.5j et 35/42
From those numbers a little variation can work but you would need to pay attention to tyre sizes

Hi Mr Wilks,

Just the bite of info I was looking for! I've been musing over a few sets of wheels for a while now, and always struggle to decode the et/width.

In particular, I had been eyeing up some out of stock CSL reps that I thought were a good fit (Front 19×8.5 ET38 & Rear 19×9.5 ET43), and they've just come back into stock on the same day I read this! Coincidence? I think not....

But before I do unspeakable things to my credit card, I've 2 questions if you would entertain them?

- What would you suggest for tyre sizes? (a range for profile/width that I should aim to stay within would be a great help).

- Will the et43 on the rear cause an issue? (you've suggested et42 as the upper guide, I'd hate for the extra mm to thwart this for me).

(For context - being fitted to e86 3.0 with B12 kit)

[MDUBZ]

i finding this website pretty useful for working out offset, you can also play with tyres sizes to see what works.

https://www.willtheyfit.com

As an example i've used my style 108s (i'm also running B12) as the current and mr wilks suggestions as the new set up numbers (with 19 rims).. once you've had a play with tyre sizes, have a look to see if they are well supported and what the difference in costs are before pulling the trigger. I currently have 2 baskets filled.. fancy some new wheels on the Z and i've just gone stage 2 on the mini so i want a wider track/ bigger footprint from the tyres.

fronts
https://www.willtheyfit.com/index.php?w ... offset2=42

Rears
https://www.willtheyfit.com/index.php?w ... offset2=42

NB. if you want performance (and comfort) it might be worth the weight saving and going for a narrower rim with a slightly bigger offset with the same tyre size that you might need to stretch over a wider rim to make them fit in the arches.. if it's just for looks go big.

tyre/rim width guides

jHVET.png (23.55 KiB) Viewed 626 times

[mr wilks]

For Si Z4 as a rule of thumb aim for front 8.5j et 38/42
Rear 9.5j et 35/42
From those numbers a little variation can work but you would need to pay attention to tyre sizes

In particular, I had been eyeing up some out of stock CSL reps that I thought were a good fit (Front 19×8.5 ET38 & Rear 19×9.5 ET43), and they've just come back into stock on the same day I read this! Coincidence? I think not....

But before I do unspeakable things to my credit card, I've 2 questions if you would entertain them?

- What would you suggest for tyre sizes? (a range for profile/width that I should aim to stay within would be a great help).

-

Those wheel would sit & fit a treat , tyre sizes for me would be 235 35 19 & 255 35 19 though possibly 225 35 19 front if the car is sitting low

[mr wilks]

For Si Z4 as a rule of thumb aim for front 8.5j et 38/42
Rear 9.5j et 35/42
From those numbers a little variation can work but you would need to pay attention to tyre sizes

In particular, I had been eyeing up some out of stock CSL reps that I thought were a good fit (Front 19×8.5 ET38 & Rear 19×9.5 ET43), and they've just come back into stock on the same day I read this! Coincidence? I think not....

But before I do unspeakable things to my credit card, I've 2 questions if you would entertain them?

- What would you suggest for tyre sizes? (a range for profile/width that I should aim to stay within would be a great help).

-

Those wheel would sit & fit a treat , tyre sizes for me would be 235 35 19 & 255 35 19 though possibly 225 35 19 front if the car is sitting low

[Calps]

Thank you both, incredibly useful as always!