[snj49er]

I think I knew the answer before you got home.

So...problem solved?

Originally Posted by nickm7

You won't believe this... Okay you probably will. There're 18's! Lol
I previously owned an E92 xDrive that was 17's and I thought for sure they were identical.

[ska///235i]

Originally Posted by snj49er

The F30 and F36 share at least the 400 and 442 style wheels, so the offset appears compatible between the two. The square 400 18x8 wheels are ET34 and the 442 19x8 fronts are ET36. But it seems that a lot of people have added 10mm +/- spacers to the OEM setup. An 8" wheel with an offset of ~25-30 would put you in a similar place.

thanks,

can you help me out with this? So lets say that the oem rear size is 18x8.5 with ET47. I'm going to get a wheel that's 18x8 ET30...what is the difference here (lets say by MM)? Is the wheel more inside or out?

[nickm7]

Well, I guess I'll start by changing out either the fronts or the rears tires to see what it does.

[snj49er]

The 18x8 ET30 wheel will extend out 11mm beyond the 18x8.5 ET47 wheel. That's 1mm inside of the 8.5" ET35 wheels that I have that are pretty damn flush on an F30.

Look at it this way: the 8" wheel surface will pull in 6mm on each side because it's a half inch narrower. Then, you're pushing it out 17mm as the offset drops from 47 to 30. 17-6=11mm add'l poke.

Originally Posted by ska///235i

thanks,

can you help me out with this? So lets say that the oem rear size is 18x8.5 with ET47. I'm going to get a wheel that's 18x8 ET30...what is the difference here (lets say by MM)? Is the wheel more inside or out?

[ska///235i]

Originally Posted by snj49er

The 18x8 ET30 wheel will extend out 11mm beyond the 18x8.5 ET47 wheel. That's 1mm inside of the 8.5" ET35 wheels that I have that are pretty damn flush on an F30.

Look at it this way: the 8" wheel surface will pull in 6mm on each side because it's a half inch narrower. Then, you're pushing it out 17mm as the offset drops from 47 to 30. 17-6=11mm add'l poke.

Got it, thanks alot

[2_Swift]

Originally Posted by nickm7

Well, I guess I'll start by changing out either the fronts or the rears tires to see what it does.

I have the same DTC problem happening every now and then when I want to speed up quickly. It especially sucks when I want to pass up a slower vehicle on the left (right lane clear with no car creeping up), turn on change lights, begin to step on it as I move over and the DTC kills my speed. This would be a bad situation for someone who thinks they have that extra speed to cut off another driver to pass. For the time being, when I want to pass with speed, I keep it on Sport +. Though, I only do this when it's dry and not raining out as I would hate to loose traction.

My current setup is:
2014 335i Xdrive msport BMS stage 1 (no drop yet)
Apex EC-7 19"
F ET35 235/35/19 Conti DWS
R ET43 275/30/19 Conti DWS

I'm tempted to buy another set of EC-7's ET35 for the rear to go square as snj49er has. Will be keeping an eye on posts to see if other members have better luck with tire combos that will help to fix this problem.

[olenikolai]

Originally Posted by jose1lm

I have the same DTC problem happening every now and then when I want to speed up quickly. It especially sucks when I want to pass up a slower vehicle on the left (right lane clear with no car creeping up), turn on change lights, begin to step on it as I move over and the DTC kills my speed. This would be a bad situation for someone who thinks they have that extra speed to cut off another driver to pass. For the time being, when I want to pass with speed, I keep it on Sport +. Though, I only do this when it's dry and not raining out as I would hate to loose traction.

My current setup is:
2014 335i Xdrive msport BMS stage 1 (no drop yet)
Apex EC-7 19"
F ET35 235/35/19 Conti DWS
R ET43 275/30/19 Conti DWS

I'm tempted to buy another set of EC-7's ET35 for the rear to go square as snj49er has. Will be keeping an eye on posts to see if other members have better luck with tire combos that will help to fix this problem.

That is not because of the tires, you are under 0,1% difference!

[2_Swift]

Originally Posted by olenikolai

That is not because of the tires, you are under 0,1% difference!

Yea, I know it shouldn't be but what else could it be? As nickm7 also stated, the only real changes were wheels/tires. Although I also have the BMS tune, it wasn't doing this when I first had the stock wheels. Its only just now happened since the new wheel/tires.

235 35 19 80.0340
275 30 19 80.0959
Delta -0.0772%
Tire Rev Difference 0 (Conti DWS)

235 35 19 80.0340
265 30 19 79.3538
Delta 0.8536%
Tire Rev Difference 6 (Conti DWS)

245 35 19 80.8998
275 30 19 80.0959
Delta 0.9987%
Tire Rev Difference 9 (Conti DWS)

The combination I have chosen seems to be the best option as to keeping the F/R diameter's under 1% difference. Wouldn't you agree? Yet something is not right.. What else would you think might be the problem?

[olenikolai]

Originally Posted by jose1lm

Yea, I know it shouldn't be but what else could it be? As nickm7 also stated, the only real changes were wheels/tires. Although I also have the BMS tune, it wasn't doing this when I first had the stock wheels. Its only just now happened since the new wheel/tires.

235 35 19 80.0340
275 30 19 80.0959
Delta -0.0772%
Tire Rev Difference 0 (Conti DWS)

235 35 19 80.0340
265 30 19 79.3538
Delta 0.8536%
Tire Rev Difference 6 (Conti DWS)

245 35 19 80.8998
275 30 19 80.0959
Delta 0.9987%
Tire Rev Difference 9 (Conti DWS)

The combination I have chosen seems to be the best option as to keeping the F/R diameter's under 1% difference. Wouldn't you agree? Yet something is not right.. What else would you think might be the problem?

Yeah, even the standard 225/45-18 & 255/40-18 on my F32 Xdrive have a -0.23% difference! I have no experience with either the Conti DWS tires or the BMS tuning, but is it possible that something went wrong with the tune?

[snj49er]

Originally Posted by jose1lm

I'm tempted to buy another set of EC-7's ET35 for the rear to go square as snj49er has. Will be keeping an eye on posts to see if other members have better luck with tire combos that will help to fix this problem.

Sorry to see 2 of these problems in the same week! Did you originally have a square setup prior to the EC-7's? If so and if it's still available, you might consider remounting that temporarily to rule out some other strange issue...like you, I don't know what that could be.

Your choice of front and rear tire sizes is as close as any OEM staggered fitment available on xDrives. The 245/40-19 and 275/35-19 set available on xDrive F10's has twice your difference in F/R size. One member here was running 235/35-19 and 255/35/19 on xDrive (2.2% difference) and made no mention of a DTC problem. Good luck getting this sorted.

[kzflags]

Originally Posted by snj49er

Sorry to see 2 of these problems in the same week! Did you originally have a square setup prior to the EC-7's? If so and if it's still available, you might consider remounting that temporarily to rule out some other strange issue...like you, I don't know what that could be.

Your choice of front and rear tire sizes is as close as any OEM staggered fitment available on xDrives. The 245/40-19 and 275/35-19 set available on xDrive F10's has twice your difference in F/R size. One member here was running 235/35-19 and 255/35/19 on xDrive (2.2% difference) and made no mention of a DTC problem. Good luck getting this sorted.

I just bought
19x9.0" ET 35
19x10" ET 40

still fishing around to find a proper tire sz to wrap these with. dtc issues with staggered wheels on xdrive.....giving me a complete headache.

[snj49er]

Originally Posted by kzflags

I just bought
19x9.0" ET 35
19x10" ET 40

still fishing around to find a proper tire sz to wrap these with. dtc issues with staggered wheels on xdrive.....giving me a complete headache.

I would guess that more forum members are running staggered setups with xDrive than square. The 2 issues with DTC problems and staggered wheels in this thread are the only ones that I've come across here...and one of those was a clear mismatch in size with a 3% f/r difference. Unfortunately, neither one checked back in here with a resolution to their problem. But I wouldn't beat yourself up over it as long as you keep the f/r sizes close.

We know that BMW equips xDrives with these sizes which are certainly narrower than you'd want to use:

F: 8x18" ET34, 225/45-18
R: 8.5x18" ET47, 255/40-18

or

F: 8x19" ET36, 225/40-19
R: 8.5x19" ET47, 255/35-19

F10 xDrives are available with this setup which would be pretty beefy on an F30. These sizes are within .7%:

F: 8.5x19" ET33 245/40-19
R: 9x19" ET44 275/35-19

Since you have 9"/10" wide wheels, you might want to consider:
F: 235/40-19 R: 265/35-19 which are within .3%.

or

F: 245/35-19 R: 275/30-19 which are within .8%. My car in post#29 of this thread is running 245/35-19 square so these would have the same size sidewall.

[kzflags]

Originally Posted by snj49er

I would guess that more forum members are running staggered setups with xDrive than square. The 2 issues with DTC problems and staggered wheels in this thread are the only ones that I've come across here...and one of those was a clear mismatch in size with a 3% f/r difference. Unfortunately, neither one checked back in here with a resolution to their problem. But I wouldn't beat yourself up over it as long as you keep the f/r sizes close.

We know that BMW equips xDrives with these sizes which are certainly narrower than you'd want to use:

F: 8x18" ET34, 225/45-18
R: 8.5x18" ET47, 255/40-18

or

F: 8x19" ET36, 225/40-19
R: 8.5x19" ET47, 255/35-19

F10 xDrives are available with this setup which would be pretty beefy on an F30. These sizes are within .7%:

F: 8.5x19" ET33 245/40-19
R: 9x19" ET44 275/35-19

Since you have 9"/10" wide wheels, you might want to consider:
F: 235/40-19 R: 265/35-19 which are within .3%.

or

F: 245/35-19 R: 275/30-19 which are within .8%. My car in post#29 of this thread is running 245/35-19 square so these would have the same size sidewall.

think im going with 235/40 and 265/35, but im going to double check w my garage first. thank you for the help brotha.
the last thing i want is to buy tires and have them come out not close to perfect

weird though cause i just checked my stock tires right now and theyre 225/45/18 front and rear. i thought bmw oem staggered tires too

[snj49er]

Originally Posted by kzflags

weird though cause i just checked my stock tires right now and theyre 225/45/18 front and rear. i thought bmw oem staggered tires too

When the car is ordered with all season tires, they are square like yours. Ordered with summer performance tires, the wheels are staggered.

Lets see some pics when your new stuff is mounted!!

[elittle80]

Is it possible to have a semi aggressive concave type wheel on an xDrive car? I've seen several M5's with a more concave wheel but I'm unclear if that look can be done with an xDrive car. Is it the size of wheel, ex. 8", 8.5", etc. or the offset? I've read through the forum but maybe I'm missing the answer...

[snj49er]

Originally Posted by elittle80

Is it possible to have a semi aggressive concave type wheel on an xDrive car? I've seen several M5's with a more concave wheel but I'm unclear if that look can be done with an xDrive car. Is it the size of wheel, ex. 8", 8.5", etc. or the offset? I've read through the forum but maybe I'm missing the answer...

A 10-11" wheel with an offset in the 40's ought to give you the look you're after. This is a nice example: http://f30.bimmerpost.com/forums/sho...&postnumber#28

[kzflags]

Originally Posted by snj49er

When the car is ordered with all season tires, they are square like yours. Ordered with summer performance tires, the wheels are staggered.

Lets see some pics when your new stuff is mounted!!

i lied, now deciding between 235/35/19 + 265/30/19, and 235/35/19 + 275/30/19 since ill be running vorti performance summer tires.

dropping it on h&r sports too in the coming weeks...

apologies for reviving this thread but are any other f30 xdrive members running one of the above?

[kzflags]

Originally Posted by bahasad

Honestly, I was getting nervous of the staggered setup even though the 235/35 and 265/30 was within 1%.

BMW sells 225/40 and 255/35 on certain tire/rim packages even on the xdrives. That may be another option if you want to stick with staggered. I think that may be like a 0.25 or 0.5% difference.

Alternatively, depending on your wheel widths, might be able to get square tires on all 4 of them, even though you wouldn't be able to rotate them, you would maintain the same rolling diameter.

i see you used to be on 235/35 and 265/30. my wheels are 19x9 ET 35 and 19x10 ET 40. why did you ditch this setup?

[kzflags]

Originally Posted by nickm7

What tire setup is yours now? I had these installed today and it seems a little jerky at about 15-20mph and again at about 40ish. Traction control light occasionally comes on- now I'm beginning to doubt my tire size selection.

hopped over to e90post and tons of members were running this setup on xdrive with 0 issues. but hop over here and it seems the f30 doesnt like these tires for some reason even though theyre .8% apart.....any conclusion as to why 235/35 and 265/30 caused DSC lights.

did you try switching to 235/35 and 275/30 to bring the rolling diameters even closer?

[bahasad]

Originally Posted by kzflags

i lied, now deciding between 235/35/19 + 265/30/19, and 235/35/19 + 275/30/19 since ill be running vorti performance summer tires.

dropping it on h&r sports too in the coming weeks...

apologies for reviving this thread but are any other f30 xdrive members running one of the above?

I ran 235/35 and 265/30 for about 8-9 months. Zero issues. They are kind of short for the F30 and don't fit the wheel wells as nice as a higher profile. Also a lot harsher than my current 235/40 all around.

[kzflags]

Originally Posted by bahasad

I ran 235/35 and 265/30 for about 8-9 months. Zero issues. They are kind of short for the F30 and don't fit the wheel wells as nice as a higher profile. Also a lot harsher than my current 235/40 all around.

great to hear, i have no beef with them being smaller as im going with performance tires

wish the guy whos car threw DSC lights would come back with a resolution though.

[snj49er]

Originally Posted by kzflags

i lied, now deciding between 235/35/19 + 265/30/19, and 235/35/19 + 275/30/19 since ill be running vorti performance summer tires.

dropping it on h&r sports too in the coming weeks...

apologies for reviving this thread but are any other f30 xdrive members running one of the above?

Another one of these traction control issues came up a week or so back with very closely sized 20" tires: http://f30.bimmerpost.com/forums/sho....php?t=1138364

I haven't seen a resolution posted for the last 3-4 of these problems. But 235/35F and 275/30R are closer in size than the OEM staggered setup so it's difficult for me to imagine tire selection is the cause. I've been hoping that someone will check back in with the secret sauce for the TC complaints.