Help!
 

So I bought wheels from a member on here. I asked questions about his setup and he informed me that no spacers were needed. I forgot to ask the most important question. Do you have sport brakes? So I dismount and remount the wheels, the rears go on fine. The fronts go on also, but as the guy is backing my car out of the bay the wheels catch my calipers :shakes head: I had already paid for mount and dismount and the place was closing so I kept the Forgestars on the rear 19X12 I believe but mounted the sport wheels on the front until I can get spacers. The rears are 275's and the fronts are 235's so as you can imagine my car is nose diving. Anyway I drive off and my instrument cluster goes crazy. The key light, ABS, VDC SES like every light is on. The speedometer doesn't move but the rev's do. REV match isn't working either and it sounds like the fan is constantly running. What happened to my car? Is it because the difference in wheels? Should I wait until I get the proper size tires and then reset the ECU? cars drives like SH*t now.

Also. The car won't turn off on the first try. I have to push the button at least 3 times before the engine will shut off..wtf?!

275 on a 12" rim?! That must be stretched like a bish. I wouldn't doubt that the change in rear diameter has affected all of the VDC systems, causing the problems you mention.

You could try unplugging the battery to clear any codes, but I'm not sure that is going to "fix" the problems.

Do you have tpms in the rear wheels?

What size sidewalls?

It does have to do with your tires. When I temporarily ran a taller sidewall than stock in the rear. 275/45. The same thing occurred to me. The speed sensor couldn't get a clean read.

The rears have them the front dont. The fronts are 235 and rear are 275. So I should be good once the wheels are closer in spec and all tpms are back? Thanks for the replies

What is the entire tire size? 235/?/? and 275/?/?

What are your wheel and tire specs?

You only the rear width but no offset, front width, or tire aspect ratio

What style wheels did you get? i'm surprised they didn't clear your brakes

Sorry. Currently the stock sport rays are mounted up front no tpms on 225/35/19. The front will be 19x10 forgestar f14. The current rear is 19x12. On 275/35/19

Forgestar specs are front -19. Rear +7.

Yes it looks as funny as it sounds :shakes head:

Those wheels, tires, and offsets are a mess.

I think we all got that? Got anything to help out though? They obviously fit on a z. I just need to know if this is the reason my car is acting up

Let me see if I got this right?

So you went from the stock 19x9 +47 to a 19x10 -19 in the front with a 225/35/19 tire? I wouldn't think these would even fit. 78 mm more poke than stock. Moves away from the strut almost 54 mm. Diameter of tire Is down 38 mm. Tire would very stretched.

Rears went from the stock 19x10 +30 to a 19x12 with a + 7 with a 275/35/19?
That's 48.4 mm more poke than stock. Tire would be very stretched

Only thing really different is I have sport brakes. Will a spacer solve my issue? What would you do?

I would believe those rims are actually 19x10 +19.

None of what your are saying makes sense though. With the 19x10 and either a-19 or +19, your wheel is moving away from the caliper. You should have clearance.
Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit

If your wheel hit the caliper who knows what damage he did.

I had F14s installed on my car today that are 18 x 10 +35 in the front, I don't think the -19 offset is right.

I hear you man. But they Don t clear. Just barely. Brakes work fine. I hooked it up to osiris/cipher and even thought the lights are on there are no codes. He was going 3 mph max and just scratched the calipers.I don't know man. You think the spacer would do it ?

Maybe because they are the super deep concave? It just barely hits. Frustrating because I always do so much research before buying. I saw these on another z and pulled the trigger basically

Spacers will help. I'd go with the smallest one you can get away with as you are pushing your wheels even further out. You'll need the stud replacement type of spacer.

I appreciate everyone's help. Unfortunately this had to happen on a weekend when I can't get parts overnighted. I'm going to go with the spacer. Hopefully getting tires and wheels that aren't do different in size will calm my car down. Either that or I'm going back to stock

You bought wheels from the original owner and he had no clue what he bought. Judging by those pictures, those wheels are not 12" wide nor are they +6. I have 12's on the rear of my car with a +26 offset and mine poke more than those. There should be some sort of marking on the inside of the wheel that tells you what size and offsets they are. Until you get the proper info, we can't help you.

R.K.

I appreciate the response. This was not a fitment question as much as a could running vastly different wheels and tires front and rear produce the issues I'm encountering. Maybe he didn't know what he bought. Like I said I saw them on a car and didn't give it a second thought. Live and learn. I just want my car normal

Then run a spacer to clear the caliper or buy different wheels.

R.K.

The question was would the difference in front to rear tires and wheels make the car act like it is?

I drove my car with the factory wheels and tire on and no TPMS installed and all I got was the light on my dash indicating a flat tire.

If your tires OD (outside diameters) are extremely off, then I can see the car not know what is going on and it drives like **** with no power. Install the tpms sensors and install proper sized tires and see what happens.

R.K.

Thank you sir.

If the caliper barely clears and you only need a small spacer you can go to Autozone or Pepboys and just find a small 3mm spacer

You should not be running those tires though, get correct sized tires if you want to run aftermarket wheels

Yea man I know I shouldn't run those. It's just temporary until I can get the spacer I need. Thanks

Just to update I went and got 3mm spavers and it clears perfectly. All of the warning lights went off on the the dash after a few miles of driving and the car turns off at th the first push of the button. Crazy to think that tires could make the car go crazy like that. Thanks everyone for your input. Happy to be in such a knowledgeable and helpful community:tup:

Glad to hear you got it worked out.

That same thing happened to me brother. I bought a set of vertini drift wheels from element wheels and was told they were guaranteed to fit and the absolutely did not. Scratched the hell out of my calipers so when I called to ask wtf?? The very first thing out of his mouth was "do you have the sport brakes" and of course I did so I was kinda frustrated with myself but also thought he could have asked me that to begin with. I'm not saying it was his fault but instead of sending me a free set of lug nuts that I didn't need he could have sold me a set of spacers. I also had all my wheels on before my friend who was helping me realized they didn't fit and of course it was too late to go to the store to get to get spacers so I had to wait and I hate waiting!!

Glad to see it worked out :tup:

Your car will love you once you get a wider tire setup post some pics!

yah, one advantage of having the wimpy brakes is that you get much better wheel selection..

It doesn't help that the Akeboners are one of the most difficult calipers to clear either