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Wheels/Tire combo question

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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mr wilks
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Wheels/Tire combo question

Post by mr wilks » Fri Dec 22, 2017 8:05 am

Busterboo wrote: Fri Dec 22, 2017 1:00 am
mr wilks wrote: Thu Dec 21, 2017 9:40 pm
Busterboo wrote: Thu Dec 21, 2017 9:26 pm
You didn't. I know they do.
They didn't feel bad in comfort terms when i had them on my first E89 (23i) they just show their deficiency when trying to enjoy a more spirited drive :driving: when they hit anything other than smooth tarmac :cry: that unnervving skittishness leaves them intolerable for me .
Here's one for you to ponder over & may help you accept you are never going to be able to prove your theory right or wrong :wink:

3 E89,s all same spec

1 has 18inch non runflats & covers 6000 miles pa
2 has 19inch non runflats & covers 4000 miles pa
3 has 19inch runflats & covers 3000 miles pa


which one will get a split wheel first ?
I don't know. I do know that my 18" 'normal' tyres have done 16,000 miles in the last year (not commuting miles - I drive the car for fun) and ...

1 they drive much, much better than runflats and ...
2 at 37,000 miles to date, the wheels ain't cracked (which, in Leicester, is remarkable).

However, as you say, perhaps they look like saloon wheels & tyres.

In an ideal world, I'd like 19s with non-runflat tyres that drove as well as 18s on non-runflats, but, since you say they drive only as well as 18s on runflats, I have no choice.
Well if you ever want to try a set of 19s with decent non runflats on your car you are more than welcome to come to Lancs & try my spare set for a drive out :driving: you might even be pleasantly surprised :oops:
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techathy
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Wheels/Tire combo question

Post by techathy » Fri Dec 22, 2017 1:55 pm

Ride quality aside I'm rolling on 18s purely for handling reasons, that 85-100mm of side wall gives a good compromise of tram-lining resistance & surface imperfection conformity/tracking v's feed back & turn in response.
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Wheels/Tire combo question

Post by mcbutler » Fri Dec 22, 2017 6:23 pm

Stick with stock, BMW built the car and tested the crap out of it. If their was a better set up they would have used it.
I have the 18" split rim wheels I don't know the number of the wheel design though.
They wear Michelin Pilot Sport 4 tyres non runflat and definitely some of the the stickiest wet day rubber (which is when you need it) you can buy.
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Wheels/Tire combo question

Post by Busterboo » Fri Dec 22, 2017 7:22 pm

mr wilks wrote: Fri Dec 22, 2017 8:05 am ... Well if you ever want to try a set of 19s with decent non runflats on your car you are more than welcome to come to Lancs & try my spare set for a drive out :driving: you might even be pleasantly surprised :oops:
Thank you very much! That's a kind offer I really appreciate. :thumbsup:

I suspect I could be the first in a line. :driving:

:)
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techathy
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Wheels/Tire combo question

Post by techathy » Sat Dec 23, 2017 10:39 am

mcbutler wrote: Fri Dec 22, 2017 6:23 pmStick with stock, BMW built the car and tested the crap out of it. If their was a better set up they would have used it.
Once you're in the range of the car behaving consistently and in a predicable manner then there's no case of a 'better' suspension setup/tyre size. Rather there are various compromises to be made and BMW have picked on a compromise which is the best balance they feel meets there goals. These goals include increasing fuel economy, satisfying emission regulations and pandering the legal department.

I go wider with wider tyres because I personally want a more chunky look to the tyres and an increase in lateral and longitudinal grip. To do this I am willing to sacrifice a bit of fuel economy, and also have a smaller 'slip' zone between absolute grip and losing control of the vehicle.
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Wheels/Tire combo question

Post by techathy » Sat Dec 23, 2017 10:41 am

mr wilks wrote: Thu Dec 21, 2017 10:47 pm
techathy wrote: Thu Dec 21, 2017 10:00 pm
mr wilks wrote: Thu Dec 21, 2017 9:51 pmI don't think the Ps4 has a direct competitor right now , its clearly the tyre of the moment but then it is the most expensive so high end performance should be a given .
Hu? The PS4s were mid-pack for pricing when I got my new tyre set.
I only look at 19s & last time i did were dearer than the others i would consider buying ( Vred / Conti / Hankook) :?
Were you looking at PS4 or PS4S? The latter seem to be the lower profile sizes required for 19" wheels on our cars and there's a premium for the 4S.
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Wheels/Tire combo question

Post by techathy » Wed Dec 27, 2017 1:20 pm

mr wilks wrote: Thu Dec 21, 2017 9:51 pm Keep us posted on the Ps4s , especially if you are doing big miles on them
Well they are much worse than RS3s when it comes driving on snow & slush. I assume this it down to the actual tread pattern of the tyres, the RS3s have those 35 degree dispersion groves across most of the tread, where as the PS4 is an all longitudinal design.
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Wheels/Tire combo question

Post by gabrielh » Wed Dec 27, 2017 4:42 pm

Decided to go 19" 235/35 front and 265/30 back. Hopefully I made the right choice :p
Got the Michelin PS 4S (there is a rebate going on here in the US, so $1000 out the door with 4new TPMS.)

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Wheels/Tire combo question

Post by gabrielh » Wed Jan 03, 2018 5:11 am

So I finally got the M4 style wheels in gunmetal/polished in 19" with Michelin PS 4S 265/30/19,235/35/19 and couldn't be happier with the ride/fitment and look.
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Wheels/Tire combo question

Post by bob4333 » Wed Jan 03, 2018 8:49 am

Great looking combination with that colour car. Gets a vote from me. :thumbsup:

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Wheels/Tire combo question

Post by del_tl1000r » Tue Jan 09, 2018 10:37 pm

Wheels look great. I have a 23i the same colour and fancy a set of those wheels. Do you know what offsets they are and have you had any rubbing issues so far? Did you fit any spacers?
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Wheels/Tire combo question

Post by gabrielh » Thu Feb 08, 2018 9:32 pm

ET 35 front and back. No rubbing issues. Didnt use spacers.
del_tl1000r wrote: Tue Jan 09, 2018 10:37 pmWheels look great. I have a 23i the same colour and fancy a set of those wheels. Do you know what offsets they are and have you had any rubbing issues so far? Did you fit any spacers?

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