So I just installed my wheels yesterday. They are 19x9.5 +33F and +45R. They are german so I installed 31mm adapters all around. Today as I drove I took this turn and my front wheels kept slipping. It felt really bad, it was like the tires just kept jumping straight forward. The VDC may be causing it but still, why?? My camber is -2.3F and -2.1 Rear. Are these adapters causing the problem or maybe the camber??
I will be buying new adapters b/c I think 31mm is too much, so I will try getting less than 25mm, if not than I will get the 25mm.
Also, how fast would the camber setting that I have now eat my tires??

 

1. How the hell are your front wheels slipping?
2. Coupe right?
3. Tire sizes?
4. Camber will have nothing to do with it
5. you'll get about 12k outta them.

 

1. Idk, they just slip, I will drive to work and see if it happens more often. Should I take off VDC and see what happens??
2. Yes, Coupe
3. 245/35/19 F 275/35 R
4. I hope not.
5. I just ordered 25mm adapters so I'm gonna lower the camber a bit just to preserve tire life.

 

Wheels shouldn't toss off VDC as that's calibrated via tire diameters. The sizes you're running in 19" are correct also, so there must be something else going on.

 

Yea I don't understand how your front tires are slipping...

Your spacers will not affect VDC and your tires sizes are correct.

Something must be up....

 

How can I test this?? The mechanic that did my alignment was like it may be too much camber but apparently he has no clue. I don;t want to drive with no VDC and end up flying off the road.

 

If the shop that did the alignment wasnt paying attention, they could have bumped the ABS sensor and that could be whats triggering it. Your tire sizes are correct for your wheel size...so it cant be that.

 

why would u get 9.5 rim and run 245/35 and on the same rim run 275/35?
275/30 is a match for 245/35

Even if rears were wider, Ud have to run 1 higher profile in the front if u want to match the staggered rear dimensions...

are you lowered running those +2 offsets in the front.

Ur car is not front wheel drive, Front wheels wont cause it to jump forward unless you're hitting the fender and feeling that.

 

So, should I drive with VDC off and see if i get the same response??

 

I drove the car with VDC off and no problems. So the VDC looks like it doesn't like my new set up. Is there a way to have it adjust??

 

sounds like a wheel sensor might be acting up. id check for any codes in the abs/vdc/tcs system.

 

I had a bum abs sensor which triggered the vdc light. Replaced the abs sensor, vdc light went away.

 

I will be putting on my new adapters some time this week. Once installed, I will try driving around with the VDC again and see if there is any change.

 

Camber and hub adaptors are probably not causing computer issues.

Tire diameter probably is the cause.
Could it be the larger diameter tires on the rear are sending a speed signal 13% slower than the fronts tires?

Do you already know what is the slowest on the road speed you are having what you call slippage?

Test for that speed before this NEXT test (write the speed down) Repeat the result by another slow speed run or find a different minimum speed that is repeatable for the computer error.
You will need to use that recorded speed again later after some tire pressure changes for test.

That speed differential may be outside of the tolerance set by ECM & ABS at speed and the computer is faintly braking the fronts to get within the speed differential allowed.

This will only cost you time initially to test for a possible answer to the computer control issue, if you are interested in what I suggest.

1) Measure air front and rear (write them down). Be certain front 245's are 34 psi each. Bleed the rear 275 air pressure down a lot, say to 26 psi. The rears are now sitting shorter in outside diameter but soft. Assume they are same outside diameter NOW as the front or even verify it with tape measure until they are a close match on O.D. My 26psi is just a start you will need to play a little to get the desired effect of same/close O.D.(outside diameter).

2) Now, drive the car up the the test speed you recorded where the issued happened. Do not drive any faster otherwise spinning forces in that rear soft tires begin to re-stretch the tire to a taller O.D.

You are now testing to prove that the computer control slippage issue does not happen under conditions that you just tested by making the tire equal diameter, hence, equal speed, hence "under the ECM speed differential" tolerances for ABS.

3) If you do this test carefully I propose that the slippage issues are eliminated for the purpose of the test ONLY.
You then will need to consider tire changes in some form that makes the tires similar O.D.
Oh, and re-inflate the rear 275's!

If the "slippage" remains have the wheel speed sensor positions checked out.

I think the forum could benefit on you responding this result, if you should take the time testing your current staggered tire choices.

 

Im going to try this test if possible b/c today I drove the car with the VDC on and there were no issues. This gave me a thought: I read somewhere on this forum about VDC not really being fully turned off even when you switch it off, so maybe the comp realized that there were no issues when I drove w/VDC off causing the comp to readjust to the new wheel/tire sizes when I turned it back on. Just a suggestion. I've only driven it once so far with VDC w/o having issues so I can't be 100% positive until I see that this is consistent.