19 Inch Rear Wheels Question

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IroningBoard

Member
As far as I am aware, the 19 inch 326m alloy wheels come in this configuration as standard on the E89:

Front Wheels: 8Jx19 ET29
Rear Wheels: 9Jx19 ET40

Can I run 8J's on the front AND rear, a 'square' setup?:

Front Wheels: 8Jx19 ET29
Rear Wheels: 8Jx19 ET29

According to willitfit.com - they will fit. Has anybody done this with the 19 Inch rims and in real-world driving will this cause any issues?

I am aware that on models with 17inch wheels, all four corners are 8J (square), but the 19 inch are offset. I wonder if running 19 inch square would cause any issues?

Obviously I would make sure that both the rears are the same whether 8J or 9J, as a mismatch on the back could cause differential problems.
 
Yes you could though a 225 rear tyre is going to look a bit peasant with a 19inch wheel like a 326 :cry: no reason why you can't fit a 245 rear & a 215 or 225 on the front to create a staggered appearance
 
mr wilks said:
Yes you could though a 225 rear tyre is going to look a bit peasant with a 19inch wheel like a 326 :cry: no reason why you can't fit a 245 rear & a 215 or 225 on the front to create a staggered appearance
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Yeah, I guess this is the dilemma. Obviously there is a benefit of being able to change corners from front to back to even out tyre wear. Just need to decide if I want to sacrifice that thicc look that the staggered setup gives the rear end.
 
IroningBoard said:
mr wilks said:
Yes you could though a 225 rear tyre is going to look a bit peasant with a 19inch wheel like a 326 :cry: no reason why you can't fit a 245 rear & a 215 or 225 on the front to create a staggered appearance
Click to expand...

Yeah, I guess this is the dilemma. Obviously there is a benefit of being able to change corners from front to back to even out tyre wear. Just need to decide if I want to sacrifice that thicc look that the staggered setup gives the rear end.
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The rear 326 is also slightly more concave so not identical to the front though it would be hard to spot to anyone not familiar with them .
Id also be tempted to fit at least a 5mm spacer behind the rear if you did go 8j et 29 & maybe even better with 12mm
 
I did notice the slight difference between the front and rear outer rim edge on the 326m alloys when shoving my pinky between the double spokes.
 
IroningBoard said:
As far as I am aware, the 19 inch 326m alloy wheels come in this configuration as standard on the E89:

Front Wheels: 8Jx19 ET29
Rear Wheels: 9Jx19 ET40

Can I run 8J's on the front AND rear, a 'square' setup?:

Front Wheels: 8Jx19 ET29
Rear Wheels: 8Jx19 ET29

According to willitfit.com - they will fit. Has anybody done this with the 19 Inch rims and in real-world driving will this cause any issues?

I am aware that on models with 17inch wheels, all four corners are 8J (square), but the 19 inch are offset. I wonder if running 19 inch square would cause any issues?

Obviously I would make sure that both the rears are the same whether 8J or 9J, as a mismatch on the back could cause differential problems.
Click to expand...

Hello, I have to ask why? :tumbleweed:
 
In that case I can see why you might consider fitting 4 fronts.

And although the rims aren't as wide, ET29s on the rear will sit the face of the rim 11mm further out than the ET40 staggered rears would.

According to "wlltheyfit" the end result would be the outer rim only sitting a couple of mm further in than the ET40 9Js which as mr wilks said you could easily disguise with wider tyres and/or a small spacer.
 
IroningBoard said:
I may be able to get a spare set of 4 8J's for a significantly reduced price.
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Understood..then as people suggest you need a 10mm spacer on the rear to bring them into approx same geometry...you can off course fiddle with other spacers front and rear but they will obviously change the geometry, especially on the front...I assume you are doing it for cost reasons, therefore fitting the 29 offset on the rear will have, IMHO, negligible impact on steering / handling without any spacer..minor cosmetic issue aside..
 
I ran my E89 on four 8Jx19 326’s but retained the 225 fronts and 255 rear tyres. It was absolutely fine and offered just a tad more rim protection on the rears
 
Number5 said:
I ran my E89 on four 8Jx19 326’s but retained the 225 fronts and 255 rear tyres. It was absolutely fine and offered just a tad more rim protection on the rears
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As the current owner of Number5's old E89 I can confirm this. They were absolutely fine in use till I took them off. I probably should say at this point the fact they were 4 fronts isn't the reason I took them off, they're tucked away at the moment simply because I prefer my black Zito's and I don't like RFT Tyres.

According to "Will they fit" with the differing offset the 8" fronts on the rear poke out 1.7mm less than the proper 9" rears so hardly noticeable and visually on the car they look identical too.

To be fair if I had left them on the car, or if I were to put them back on I'd ditch the RFT's and move to a rear 245 tyre instead of the 255 as its a tad big for a 8" wheel.

Obviously the major benefit to this 4 front setup is the fronts are much less prone to cracking than the rears and are therefore easier to source uncracked/welded. But I honestly can't think of any major drawback to using this setup. Even running a skinner 245 rear tyre shouldn't be a issue power/handling wise. You just have to look at the F20 1 series 135/40i to see other BMW's running from the factory a F225/R245 setup with way in excess of 300 BHP. If anything the car will be slightly less prone to understeer with a skinner rear tyre. :thumbsup:
 
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