Checking offset numbers before purchase

Pagan · Post by **Pagan** » Thu Oct 31, 2024 9:17 pm

Hello, I’m just about to pull the trigger on some new wheels for my Z4 E85. I’ve plugged the numbers into the usual sites, and they seem okay, but I’d really appreciate double-checking that these are right (especially offset):
Front: 18x8.5” ET38 (probably with 235/40 tyres)
Rear: 18x9.5” ET40 (probably with 255/35 tyres)

I’m looking to have the wheels a little further out than stock but nothing too extreme, and I definitely want to avoid rubbing. I probably will be putting in some slightly sportier coil springs (30mm drop).

Thanks.

RMB · Post by **RMB** » Thu Oct 31, 2024 9:29 pm

Which car?

Pagan · Post by **Pagan** » Thu Oct 31, 2024 9:51 pm

E85 (non-M), thanks. I've edited the original post to include this.

j3nks79 · Post by **j3nks79** » Sun Nov 03, 2024 12:44 pm

I run a rear 18” 10J ET40 with 255/35 zero problems.
Fronts 18” 8.5J ET35 with a 225/40 zero problems

darich · Post by **darich** » Wed Nov 20, 2024 11:18 am

My wheel and tyre sizes
Rear
255x30x19
9.5x19 39ET

Front
235x35x19
8.5x19 35ET

E86 M Sport with standard suspension.
No issues

Zedebee · Post by **Zedebee** » Wed Nov 20, 2024 12:58 pm

They aren’t “right”, i.e. they are not the OEM sizes/offset, but they should be fine.

RossT · Post by **RossT** » Fri Jan 17, 2025 3:11 am

Hi Pagan, were those Enkei wheels you were looking at?

I only ask as the sizes and offsets look very similar to a few designs I've been considering! Did you go ahead in the end?

Pagan · Post by **Pagan** » Fri May 30, 2025 7:42 pm

Hey Ross, it was JR actually. I've purchased but not yet fitted!

RossT · Post by **RossT** » Sat May 31, 2025 6:12 pm

Pagan wrote: Fri May 30, 2025 7:42 pm Hey Ross, it was JR actually. I've purchased but not yet fitted!

Ah, thanks for the reply. Would like to see some shots once you get them on, I love wheels!

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