Rear wheels to the front???

TexasZed4MC · 10-22-2012, 09:39 PM

I know you can run 18x9 et35 on the fronts all day. Can somebody explain why you can't run stock rear wheels on the front of the Z4 M???? I have seen offsets as low as 22 on the fronts with 9.5 widths. I realize I will have to dial in more camber but thats standard for track use anyway.
And even run a 5MM spacer on the rears also.

v3.2mc · 10-22-2012, 09:58 PM

9.0 et30 + 5mm spacer = 9.0 et25

not et35.

TexasZed4MC · 10-22-2012, 10:02 PM

Duh. Sorry was thinking backward. fixed the top question. thanks for the numbers correction

TexasZed4MC · 10-24-2012, 01:53 PM

ANY help guys?

The HACK · 10-24-2012, 02:42 PM

You can certainly run rear stock wheels up front. With enough camber. That's what some budget strapped E46 M3 racers usually do, they'll get a set of 4 rear wheels for the E46 M3 and run a squared setup that way, and go 275 wide all around for maximum grip.

IF you're on an aftermarket suspension with adjustable collars, you'll need to keep a set of very close eyes on the relationship between the collars to the inside of the tire, as well as the distance between the outside of the tire to the arch. It can be done with 3-3.5º negative camber on the E46 M3 when the wheel arch liner is removed. I suspect it can be done on the MZ4 Coupe if the same parameters are followed.

As it currently stands, I'm fairly confident that I CAN run the 275 all around on a set of 4 rear wheels if I increase front camber from -2.5 to -3.5, since with the addition of the camber bolts on the bottom it brings the top of the wheel closer to strut, thus giving more clearance space on the outside to the arch. Ideally, if I can get a set of 18"x9.5" with 23-27 mm offset, I can run the same wheel set-up front and back and rotate the track tires with some moderate rolling of the fender lips on the front.

TexasZed4MC · 10-24-2012, 04:31 PM

EXCELLENT INFO. Thanks for the help! I have extra wheels laying around and I figured why not use those for autocross and some ARC-8's for DE's and whatever for street.
Thanks

10-22-2012, 09:39 PM	#1
TexasZed4MC Captain 148 Rep 688 Posts Drives: 2006 Interlagos Z4 M Coupe Join Date: Oct 2011 Location: Texas iTrader: (1)	Rear wheels to the front??? I know you can run 18x9 et35 on the fronts all day. Can somebody explain why you can't run stock rear wheels on the front of the Z4 M???? I have seen offsets as low as 22 on the fronts with 9.5 widths. I realize I will have to dial in more camber but thats standard for track use anyway. And even run a 5MM spacer on the rears also. __________________ Lone Star Chapter BMWCCA HPDE Event Chair, Texas Trifecta Event Chair, & BMWCCA driving Instructor Last edited by TexasZed4MC; 10-23-2012 at 05:57 AM.. Reason: reword
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10-22-2012, 09:58 PM	#2
v3.2mc Not a New Member 94 Rep 925 Posts Drives: with both hands and both feet Join Date: Mar 2012 Location: midwest iTrader: (4) Garage List 2007 ///M Coupé [10.00]	9.0 et30 + 5mm spacer = 9.0 et25 not et35. __________________ #1498E86 \| Sepang Bronze \| Dark Sepang Leather \| Carbon Leather Trim
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10-22-2012, 10:02 PM	#3
TexasZed4MC Captain 148 Rep 688 Posts Drives: 2006 Interlagos Z4 M Coupe Join Date: Oct 2011 Location: Texas iTrader: (1)	Duh. Sorry was thinking backward. fixed the top question. thanks for the numbers correction __________________ Lone Star Chapter BMWCCA HPDE Event Chair, Texas Trifecta Event Chair, & BMWCCA driving Instructor Last edited by TexasZed4MC; 10-23-2012 at 05:58 AM..
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10-24-2012, 01:53 PM	#4
TexasZed4MC Captain 148 Rep 688 Posts Drives: 2006 Interlagos Z4 M Coupe Join Date: Oct 2011 Location: Texas iTrader: (1)	ANY help guys? __________________ Lone Star Chapter BMWCCA HPDE Event Chair, Texas Trifecta Event Chair, & BMWCCA driving Instructor
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10-24-2012, 02:42 PM	#5
The HACK Midlife Crises Racing Silent but Deadly Class 1820 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	You can certainly run rear stock wheels up front. With enough camber. That's what some budget strapped E46 M3 racers usually do, they'll get a set of 4 rear wheels for the E46 M3 and run a squared setup that way, and go 275 wide all around for maximum grip. IF you're on an aftermarket suspension with adjustable collars, you'll need to keep a set of very close eyes on the relationship between the collars to the inside of the tire, as well as the distance between the outside of the tire to the arch. It can be done with 3-3.5º negative camber on the E46 M3 when the wheel arch liner is removed. I suspect it can be done on the MZ4 Coupe if the same parameters are followed. As it currently stands, I'm fairly confident that I CAN run the 275 all around on a set of 4 rear wheels if I increase front camber from -2.5 to -3.5, since with the addition of the camber bolts on the bottom it brings the top of the wheel closer to strut, thus giving more clearance space on the outside to the arch. Ideally, if I can get a set of 18"x9.5" with 23-27 mm offset, I can run the same wheel set-up front and back and rotate the track tires with some moderate rolling of the fender lips on the front. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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10-24-2012, 04:31 PM	#6
TexasZed4MC Captain 148 Rep 688 Posts Drives: 2006 Interlagos Z4 M Coupe Join Date: Oct 2011 Location: Texas iTrader: (1)	EXCELLENT INFO. Thanks for the help! I have extra wheels laying around and I figured why not use those for autocross and some ARC-8's for DE's and whatever for street. Thanks __________________ Lone Star Chapter BMWCCA HPDE Event Chair, Texas Trifecta Event Chair, & BMWCCA driving Instructor Last edited by TexasZed4MC; 10-25-2012 at 08:48 AM..
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