Performance 313 wheels - difference in concave E89/E90?

[Antinontoxic]

Is there a difference in concave between E90 and E89 fitment or will E90 fitment look exactly the same regardless higher offset?

E90
19x8 ET37

E89
19x8 ET29

[ChuckB]

The E89 version puts the center line of the wheel closer in to the body, and given they both have the same width, the E90 wheels will sit out farther, I would have some concerns about them clearing the body. Look in my garage and you can see how close the E89 version sit to the body. I also have K&N springs, which have lower the car just bit, as well as the Active Suspension. If you can test fit them, then please do it before you buy.

[Antinontoxic]

19x8 ET37 E90 fitment with 8mm spacer will have exactly the same specs as 19x8 ET29 E89 fitment.

What I want to know is if either one of these two have more concave?

For example, if you compare Style 313 front and back wheels, you can see that the rear wheels have more depth on them hence being 19x9. Lower offsets can also generate more concave/depth and therefore I would like to know if 19x8 313's have the same amount concave regardless their offset (ET37 for E90 / ET29 for E89).

In short: Will E89 fitment front wheels have more concave/depth than E90 fitment front wheels? I'm not interested in knowing how they fit.

[Wiles]

Originally Posted by Antinontoxic

...

In short: Will E89 fitment front wheels have more concave/depth than E90 fitment front wheels? I'm not interested in knowing how they fit.

Short answer, I don't know. If you are not interested in how they fit, I am confused. What would the point be, if they don't fit.

[Antinontoxic]

Originally Posted by wiles335i

Short answer, I don't know. If you are not interested in how they fit, I am confused. What would the point be, if they don't fit.

I'm not interested in knowing how they fit, because I know E89 fitment obviously works and I can use spacers with E90 fitment generating the same offset as E89 fitment. Case closed: both will work.

What I don't know is if E89 fitment front wheels look deeper compared to E90 fitment.

[HerrK]

Originally Posted by Antinontoxic

I'm not interested in knowing how they fit, because I know E89 fitment obviously works and I can use spacers with E90 fitment generating the same offset as E89 fitment. Case closed: both will work.

You have to be careful with 8mm spacers as you are eating up a lot of the center hub dimension. This can get you into potential problems as you are now only mounting the wheel in the chamfer & not truely centered on the hub.

As a followup to this - I was doing my 15K miles cross rotation and "crack check" on the 296's, happy to state no issues. But I did measure the F & R hubs at 12mm extension from the rotor. The 296's have a chamfer of 7mm so you are really pushing your luck to get the hub centric mounting with any spacer greater than 5mm. Maybe the 313's are different but I'd put a digital caliper to them before I randomly started adding spacers.