E86 on 19’s question...

[True-Blue]

So I’ve just picked up a set of 19’s for my E86, which need a referb but no cracks and can’t see any obvious flat spots... all good so far.

Just giving them a quick clean up to have a better look and It struck me just how little ‘tyre’ there is!

The tyres are scrap, so being replaced, but they are in the correct sizes.

I’m going down the Eibach Pro / Bilstein B4 route, which I believe is a bit more supple ( Forgiving ) than the standard Msport set up.

I’ve only been in a coupe on 19’s for about 25 mins, so my question is... is the ride still enjoyable (relatively comfortable) over decent distances in a coupe on 19’s (non run flats)?

I’m at the point we’re I could sell these rims before referbing them and not lose money, but I don’t really want to go to the expense of a referb and decent quality 19’’ tires and then sell them for a loss.... it it’s going to be painful to drive!

I realise there’s plenty of E85’s on 19’s, but they are a bit more compliant I think due to reduced chassis stiffness.

 

[mr wilks]

Simple answer is with the right choice of tyre brand - sizes & pressures you can run a 19inch wheel on any Z4 without compromising comfort over a 18inch or even a 17inch

 

[True-Blue]

Simple answer is with the right choice of tyre brand - sizes & pressures you can run a 19inch wheel on any Z4 without compromising comfort over a 18inch or even a 17inch

Ok, so I’ve bought a set of 230’s

I think the recommended front tyre size for these is 225/35/19 and rear 255/30/19 to avoid rubbing on a lowered E86? .. I was considering Vredstein Ultrac Vorti’s as the car will only be used during the summer months and I’m not going to take it out in the wet on purpose... so not too worried about wet weather performance really

Sound like a plan? ...or am I barking up the wrong tree?

 

[mr wilks]

Simple answer is with the right choice of tyre brand - sizes & pressures you can run a 19inch wheel on any Z4 without compromising comfort over a 18inch or even a 17inch

Ok, so I’ve bought a set of 230’s

I think the recommended front tyre size for these is 225/35/19 and rear 255/30/19 to avoid rubbing on a lowered E86? .. I was considering Vredstein Ultrac Vorti’s as the car will only be used during the summer months and I’m not going to take it out in the wet on purpose... so not too worried about wet weather performance really

Sound like a plan? ...or am I barking up the wrong tree?

Only thing i would change is the rear tyre size to 245 35 19 for the 9j rim , otherwise id say the Vred is a perfect choice of brand & 225 35 is fine for the front 8j .
Pressures i would kick off at 33psi front 36psi rear then up or down to suit your own thoughts on comfort /grip

 

[True-Blue]

Simple answer is with the right choice of tyre brand - sizes & pressures you can run a 19inch wheel on any Z4 without compromising comfort over a 18inch or even a 17inch

Ok, so I’ve bought a set of 230’s

I think the recommended front tyre size for these is 225/35/19 and rear 255/30/19 to avoid rubbing on a lowered E86? .. I was considering Vredstein Ultrac Vorti’s as the car will only be used during the summer months and I’m not going to take it out in the wet on purpose... so not too worried about wet weather performance really

Sound like a plan? ...or am I barking up the wrong tree?

Only thing i would change is the rear tyre size to 245 35 19 for the 9j rim , otherwise id say the Vred is a perfect choice of brand & 225 35 is fine for the front 8j .
Pressures i would kick off at 33psi front 36psi rear then up or down to suit your own thoughts on comfort /grip

Awesome, thanks for the tip re the 245’s
Am I right that 235’s on the front may rub?

 

[mr wilks]

I would expect to catch the liner on front with 235 35 fitted & 225 35 may not fully do it ( can depend on car & tyres being new or part worn )
The style230 being 8j front so no need to go 235 , even a 215 35 would work to be 100% sure as its always a possibility for minor rub on full lock or on heavy compression with et37 19s on a E86

 

[z4pilot]

As you've raised concerns over ride quality, the only thing I would add to Mr Wilks comments is that when I've run 19's, the car felt a little heavier on it's feet - which is probably down to the increase in unsprung weight of 19's + tyres compared to 18s. Obviously it's dependant upon the difference in weight between the two, so if the 230's are light, it may not be something to consider. When I went back to 18s, the car definitely felt a little nimbler.

And I also noticed a drop in mpg on 19s - only 1mpg via the on board computer, so I didn't care personally - it was worth it for the looks

 

[True-Blue]

As you've raised concerns over ride quality, the only thing I would add to Mr Wilks comments is that when I've run 19's, the car felt a little heavier on it's feet - which is probably down to the increase in unsprung weight of 19's + tyres compared to 18s. Obviously it's dependant upon the difference in weight between the two, so if the 230's are light, it may not be something to consider. When I went back to 18s, the car definitely felt a little nimbler.

And I also noticed a drop in mpg on 19s - only 1mpg via the on board computer, so I didn't care personally - it was worth it for the looks

Thanks for this,

I ‘beleive’ The 230 wheel is ‘relatively’ light for a cast 19’’ from the Googling I’ve done...

The 18’’ 135’s are circa 11.93kg
The 19’’ 230’s are circa 12.63kg

That’s for rears, fronts are slightly lighter.... but the internet could be wrong!

 

[tee.gilding]

I think the recommended front tyre size for these is 225/35/19 and rear 255/30/19 to avoid rubbing on a lowered E86?

Nothing wrong with the ride with 30's on the rear. I've got 19's on mine with 35's front and 30's rear, as per your research and it's comfortable on long distances - as long as the roads aren't utter shite. But that's the case for pretty much all low profile tyres, so yeah. Go for gold!

I think 35 profile 19's will give a bit of a speedo error. Check willtheyfit.com for full breakdown.