Problems with new rims
Problems with new rims I just got my 18"x10.5" zo6 rims on today, and just randomly on my way home the abs light and the e-brake light came on. I was wondering did something **** up? We had to do the BFH mod to get the wheels to fit, and also had to remove the bump stop. I'm hoping removing the bump stop didn't **** anything up, because that bitch isn't getting back on, because we also went to hell on the mounting bracket. Did I really FUBAR my car, or is this normal with running a larger tire? The tires are nitto 555 285/40/18.
Last edited by AznMuscle; Aug 31, 2007 at 11:41 AM.
40 ratio on the back, 35 on the front. So the different overall diameter would cause my ABS not to function properly? About the bump stops...thats just going to give me a rougher ride, and not cause any serious problems, correct?
I have 275/40/17 in the rear and 315/35/17 in the rear and I dont have either one of those lights on. I dont think that removing the bumpstop would do that either, hopefully someone else knows cause Im puzzled lol.
The lights come on randomly for some reason. I just went into town, and the lights weren't on, then half way home they came on again. My back right wheel is also making noises around bumpy turns, which is from what I'm guessing, the lack of bumpstops. Xx01, did you have to remove you're bump stops to fit a 17x11 rim?
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Originally Posted by AznMuscle
40 ratio on the back, 35 on the front. So the different overall diameter would cause my ABS not to function properly? About the bump stops...thats just going to give me a rougher ride, and not cause any serious problems, correct?
Bump stops missing=Car's fender may bottom out on tires. Nothing to do with ABS. (Unless you nicked a brake line... I can't envision that one.)
Differant overall diameter WILL interfear with your ABS. The over all diameter can be off a little... but it has to be close. It is the overall tires diameter that counts, not the aspect ratio.
My suggestion, get some P285/40/18 for the front.... and I bet that problem goes away.
Those 40 aspect ratio probably set the car up somewhat from the gound, and probably threw off your speedometer as well. A better choice would have been P285/35/18.
Last edited by wabmorgan; Aug 31, 2007 at 01:12 PM.
Maybe the bump stop bracket is hitting the springs? Because the sound is more a metal grinding sound, not a rubbing sound. And 285's for the front wouldn't turn so well, seeing as these cars don't have the best of turn radius' to begin with.
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UPDATE: The metal clinging noise has stopped, the inside of the rims were rubbing the fender wells, but we fixed that with a nice sized hammer 
. Now my only problem is the lights, which I'm gonna go check out tomorrow. But now...I LOVE MY RIMS lol. Just wish they were a little bit wider...but that will come in time.
. Now my only problem is the lights, which I'm gonna go check out tomorrow. But now...I LOVE MY RIMS lol. Just wish they were a little bit wider...but that will come in time. LS1 Tech Stories
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Verdad Gallardo TECH Fanatic
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From: USS Enterprise 1701
The SS and WS6 come with 17's running p275s on all fours.
There are also LOT of people that are running p275 on all fours. I've got p285/35r18 on all fours.... never seen a turning problem yet.
As for the bump stop.... If you only removed them.... it might be that. You may need a spacer back there.... depends on the offfset and if you are rubbing... especially metal to metal. {OK... glad to hear this problem has been solved for you}
Also, with my p285, being that they are 35 aspect ratio.... I DID NOT have to do the BFH.
The main thing is.... the tire MUST have approximately the same sidewall height.
p285/40 has a side wall height of 114mm
p255/35 had a side wall height of 89.25mm
That is a differance of 24.75mm. When you consider it is the over all tire diameter that counts.... that is really 24.75*2= 49.5mm. That's nearly 5cm of over all diameter differance.... which converts to an over all diameter differance of 1.94 inches.
I think there is your ABS problem.
Your rear tires are too tall or your fronts are too short.... depending on how you look at it.
Those are only approximations.... I would consult the tire manufacturers site and compare over all tire height. You might also check the sticky for more info.
If you only just put on new rims and tires on the rear.... and... if you still have the old rims and tires.... slap them back on the rear and see if the ABS problem goes away.... I almost bet it does.
There are also LOT of people that are running p275 on all fours. I've got p285/35r18 on all fours.... never seen a turning problem yet.
As for the bump stop.... If you only removed them.... it might be that. You may need a spacer back there.... depends on the offfset and if you are rubbing... especially metal to metal. {OK... glad to hear this problem has been solved for you}
Also, with my p285, being that they are 35 aspect ratio.... I DID NOT have to do the BFH.
The main thing is.... the tire MUST have approximately the same sidewall height.
p285/40 has a side wall height of 114mm
p255/35 had a side wall height of 89.25mm
That is a differance of 24.75mm. When you consider it is the over all tire diameter that counts.... that is really 24.75*2= 49.5mm. That's nearly 5cm of over all diameter differance.... which converts to an over all diameter differance of 1.94 inches.
I think there is your ABS problem.
Your rear tires are too tall or your fronts are too short.... depending on how you look at it.
Those are only approximations.... I would consult the tire manufacturers site and compare over all tire height. You might also check the sticky for more info.
If you only just put on new rims and tires on the rear.... and... if you still have the old rims and tires.... slap them back on the rear and see if the ABS problem goes away.... I almost bet it does.
Last edited by wabmorgan; Sep 1, 2007 at 12:32 AM.
Thanks, I was thinking about doing that..but no tires on two of the rims. They were ridding almost to the cords, so Discount got rid of them. Everything seems to be fine now, but my offset on the rims is 58....that MIGHT have been the problem. I honestly didn't think rim and tire combos were this important...until now lol.
Like has been previously stated it is not bump stops or offset or any other problem. The problem is the tires do not have the same overall size ratio. You can do a google search for tire size calculator and plug in the factory tire size and your aftermarket size to get close numbers. The front overall size ratio must be close to the rear overall size ratio. Otherwise it will cause these lights. I had to get different size tires when I got new rims to fix this problem.
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The offset might have casued your metal rubbing metal problems.... but not your ABS. An off set of 58mm on a 10.5in wide rim probally put them in a little close... but seems like your BFH mod has resolved that!!!!!!!!! 
[if not... get a thin spacer and put it in... it will take care of the rubbing problem.]
The ABS error problem is that with differant diameters front than rear.... the ABS thinks the wheels are slowing down at differant rates(which they are... they are spining at differant rates for any given speed) and this drives the ABS crazy..... it really has no idea what to do and thus the error lights.
Get you some P275 or P285 for the front.... it will probably fix you up just fine.... only problem maybe you might be higher off the ground than you would like going with a 40 series tire.
Welcome to 4x4 country. (Sorry.... I couldn't resist and the very second you post pics, you will no doubt be told you need to lower the car regaudless of what ratio aspect you run.)
Always gets said when someone puts on new wheels... unless the car has already been lowered.
[if not... get a thin spacer and put it in... it will take care of the rubbing problem.]The ABS error problem is that with differant diameters front than rear.... the ABS thinks the wheels are slowing down at differant rates(which they are... they are spining at differant rates for any given speed) and this drives the ABS crazy..... it really has no idea what to do and thus the error lights.
Get you some P275 or P285 for the front.... it will probably fix you up just fine.... only problem maybe you might be higher off the ground than you would like going with a 40 series tire.
Welcome to 4x4 country. (Sorry.... I couldn't resist and the very second you post pics, you will no doubt be told you need to lower the car regaudless of what ratio aspect you run.)
Always gets said when someone puts on new wheels... unless the car has already been lowered.
Originally Posted by wabmorgan
The offset might have casued your metal rubbing metal problems.... but not your ABS. An off set of 58mm on a 10.5in wide rim probally put them in a little close... but seems like your BFH mod has resolved that!!!!!!!!! [if not... get a thin spacer and put it in... it will take care of the rubbing problem.]
The ABS error problem is that with differant diameters front than rear.... the ABS thinks the wheels are slowing down at differant rates(which they are... they are spining at differant rates for any given speed) and this drives the ABS crazy..... it really has no idea what to do and thus the error lights.
Get you some P275 or P285 for the front.... it will probably fix you up just fine.... only problem maybe you might be higher off the ground than you would like going with a 40 series tire.
Welcome to 4x4 country. (Sorry.... I couldn't resist and the very second you post pics, you will no doubt be told you need to lower the car regaudless of what ratio aspect you run.) Always gets said when someone puts on new wheels... unless the car has already been lowered.
[if not... get a thin spacer and put it in... it will take care of the rubbing problem.]The ABS error problem is that with differant diameters front than rear.... the ABS thinks the wheels are slowing down at differant rates(which they are... they are spining at differant rates for any given speed) and this drives the ABS crazy..... it really has no idea what to do and thus the error lights.
Get you some P275 or P285 for the front.... it will probably fix you up just fine.... only problem maybe you might be higher off the ground than you would like going with a 40 series tire.
Welcome to 4x4 country. (Sorry.... I couldn't resist and the very second you post pics, you will no doubt be told you need to lower the car regaudless of what ratio aspect you run.)
Always gets said when someone puts on new wheels... unless the car has already been lowered. TECH Fanatic
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I'm running p285/35r18 on the front.... no problems.... but that 40series may give you some trouble up front. My 35s are close to rubbing the plastic fender liner....
You might be able to run a 285/35 on the front....
then you would have 285/35=99.75mm vs 285/40=114
or you might go to a 275/40 on the front
275/40=110mm vs 285/40=114mm
I think the 275/40 up front would be the best choice.... if it will fit without rubbing.
As for stickout... depends on your offfset... but I think if you have a 56mm offset or near there.... you will be fine.
You might be able to run a 285/35 on the front....
then you would have 285/35=99.75mm vs 285/40=114
or you might go to a 275/40 on the front
275/40=110mm vs 285/40=114mm
I think the 275/40 up front would be the best choice.... if it will fit without rubbing.
As for stickout... depends on your offfset... but I think if you have a 56mm offset or near there.... you will be fine.
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Can't he just have his **** tuned so the computer knows what size of tires/rims he is running, correcting the speedometer and the ABS confusion WITHOUT spending money on NEW tires? Seems to me that any speed shop can do this... or any hand held tuner (like Hypertech, as suggested to me by the wheel directer: Xsta Z 28)
