E89 19'' Wheel > Tyre Sizing

Wingman · Post by **Wingman** » Tue Nov 06, 2018 5:08 pm

So i've been looking though the forums and just wanted to check before ordering the general consensus on 19'' Alloys and Tyres on the Z4

So I have a 35i and wanted to check if this spec is ok to go ahead with and order.

Alloys are 8J ET29 & 9J ET40 back

Tire size most seem to recommend is 235/35 R19 and 265/30 R19 rear

Brand Michelin PSS now discontinued so going for Michelin Pilot PS4S

Has any got these sizes fitted to 8 & 9J Alloys. I'm just a bit worried about stretch on the rears and if it will affect appearance?

Cheers

Below is the before and after differences on OEM 19'' Alloys on 235/35 - 265/30 set up v's standard 225/35 - 255/30 size.

: tyre size diff.jpg (124.16 KiB) Viewed 3362 times

David-H · Post by **David-H** » Tue Nov 06, 2018 6:50 pm

On my 35i I'm on 326Ms (same size offsets as you're proposing) and can confirm that 235/35 F and 265/30 R tyres will be fine and the rears will certainly not appear 'stretched' at all.

Mr Tidy · Post by **Mr Tidy** » Tue Nov 06, 2018 11:22 pm

BTW welcome to the forum Wingman - glad you got a helpful answer.

But we do like to see photos of new members' cars.

PinkPineapple44 · Post by **PinkPineapple44** » Tue Nov 06, 2018 11:48 pm

There will be zero stretch with a 265/30 on a 9j. I would personally recommend a 225/35 front and 255/35 rear set up on 8 and 9j for the e89.

Lazza · Post by **Lazza** » Wed Nov 07, 2018 12:07 am

I’ve just ordered 235/35 & 255/35 for my 35i. Slight with increase on the front and slight profile increase on the rear means both end end up with roughly the same diameter increase. Same enough anyway.

Wingman · Post by **Wingman** » Wed Nov 07, 2018 2:09 am

So why are so many Z4 forum members saying the 235/35 - 265/30 set up offers a smoother ride?

mr wilks · Post by **mr wilks** » Wed Nov 07, 2018 8:10 am

Wingman wrote: ↑Wed Nov 07, 2018 2:09 am So why are so many Z4 forum members saying the 235/35 - 265/30 set up offers a smoother ride?

You are obviously increasing the amount of rubber but most likely those who report the smoother ride after changing the sizes have also switched from runflats at the same time .
255 35 rear is certainly a must for me

bryand · Post by **bryand** » Sat Feb 23, 2019 1:40 pm

I'm just about to make the jump to non RFT's, I see that the general consensus for the rears is to go 255 35 19, what's the consensus for the fronts? Keep at 225 35 or something else?

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