So many of these threads, why is everyone so allergic to math.

Lets take your front wheel for example, factory is 19x8.5 with a +12mm offset. Converting front rim width to mm gives us roughly 216mm, you're talking about running an even higher offset with a wider wheel so primary concern is backspacing and internal interference in the wheel housing.

Factory backspacing: (216mm/2)+12mm = 96mm backspacing on the factory wheel, or roughly 3.77"

9.5x20ET15: (241mm/2)+15mm = 105mm backspacing on your first aftermarket choice, or roughly 4.1"

To compound fitment issues you're also adding 25.5mm diameter which will further degrade internal fitment at full lock with another 26mm of rim width. Roughly calculating further arc reach using a 30-60-90 triangle it will be an additional 12mm. This ignores caster, camber and ackerman so we'll add 10% safety net:
(9mm [additional offset] + 12mm [additional reach due to increased rim width]) + ((9+12)*.10) [10% safety factor] = 23mm or .9" of additional reach into the wheel well.

We haven't got into tires yet, their section width, the additional safety factors for actual section width once placed on your wheel width. Long story short, you'll want to decrease offset, not increase. The math can reversed to see how far you can go in the other direction and then decide what does or doesn't fit.

Or, you can just Google, as these questions have been asked and answered for over 10 years now by people who have put countless different sizes of rims/tires on their cars and reported whether or not it worked.

 

So many of these threads, why is everyone so allergic to math.

Lets take your front wheel for example, factory is 19x8.5 with a +12mm offset. Converting front rim width to mm gives us roughly 216mm, you're talking about running an even higher offset with a wider wheel so primary concern is backspacing and internal interference in the wheel housing.

Factory backspacing: (216mm/2)+12mm = 96mm backspacing on the factory wheel, or roughly 3.77"

9.5x20ET15: (241mm/2)+15mm = 105mm backspacing on your first aftermarket choice, or roughly 4.1"

To compound fitment issues you're also adding 25.5mm diameter which will further degrade internal fitment at full lock with another 26mm of rim width. Roughly calculating further arc reach using a 30-60-90 triangle it will be an additional 12mm. This ignores caster, camber and ackerman so we'll add 10% safety net:
(9mm [additional offset] + 12mm [additional reach due to increased rim width]) + ((9+12)*.10) [10% safety factor] = 23mm or .9" of additional reach into the wheel well.

We haven't got into tires yet, their section width, the additional safety factors for actual section width once placed on your wheel width. Long story short, you'll want to decrease offset, not increase. The math can reversed to see how far you can go in the other direction and then decide what does or doesn't fit.

Or, you can just Google, as these questions have been asked and answered for over 10 years now by people who have put countless different sizes of rims/tires on their cars and reported whether or not it worked.

He's running KWV3 which is something that changes the space allowance. I know on my front end the 19x9.5 et5 wheels I have with 275/35 tires it is pretty damn close to the spring base of the KWV3.

 

Was gonna post rimsntires calculator only to find their website is gone - bummer. Regardless plenty of other online calculators, just do your homework...

 

My set-up front is 20X9 ET13 + 5mm spacer = a final ET of 8 with 255/35/20. I had to run a 5mm spacer because I was rubbing the spring perch on my KWV3s.

Rear set-up is 20X10 ET20 with 285/30/20 no spacers in back but there's about 8-9mm gap between the wheel and fender.

From my calculations and @specialized2010 set-up the ideal ET would be 9.5 ET5 front and 10.5 ET 20-23 (depending on tire size) in the rear.
I've personally seen @specialized2010 set-up multiple times and it's damn near as perfect as I've ever seen on an E60 and no spacers required. As a matter of fact I just put the order in with BC Wheels on a set with the same specs as his. So I'll have a set of ultra rare forged BBS RE wheels and Michelin SPs for sale soon!

 

F — 19x9 ET18 275/35/19 +15mm spacer

R — 19x10 ET25 305/30/19

MCS coilovers, like many coilovers, will give more clearance on the spring collar v. OEM. I have zero rubbing on the shock collars or outer fenders. I get the tiniest bit of rubbing on deep compression from the rear passenger inner fender liner.

(Edit: -2.0/-2.5 F/R camber)

 

 

Great thank you at all

 

My new setups:

BBS Rs2 summer

9x 20 ET 22 with 15mm spacers -> ET 7 255/35 20
10x 20 ET 25 with 7mm spacers ->ET 18 285/30 20

with Michelin PS4S

Alpina 20 Dynamica winter

9x20 ET 20 with 12 mm spacers-> ET 8 255/35 20
10x20 ET 22 with 5mm spacers -> ET 17 285/30 20

with Michelin Alpin 5

on KW V3

 

worst post ever.

i wanna see some pics with the RS2's

 

Pics or it didn't happen, sounds pretty - lets see the setup.

 

Pics!!!!

 

Custom work on the rs2. I will post pics of them in 2 weeks I was lucky to find it.

Silver polished black screws and black carbon bbs badge.

 

Is this set of ebay klienanzeigen?

 

no someone wrote me on my search query post.