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Old Feb 25, 2011 | 11:09 AM
  #1  
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bump stops

I've read lots about cutting bump stops but don't know what they are, where they are and what it does to cut them and how to cut them...

Can anybody give me this information?

Thanks
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Old Feb 25, 2011 | 11:48 AM
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Re: bump stops

No reason to cut them since you can just unbolt them. Can't think of a reason to do that though either. Some people may take them off of they lower the car, bit then bottoming out is going to be loud and jolting with nothing soft to dampen it. I would leave them alone.
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Old Feb 25, 2011 | 11:53 AM
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Re: bump stops

Only reason you should be cutting the bump stop area out is to gain clearance for wider rims. I did a write up a while ago with pics. Just do a search for 15x10 rims with 6.5 backspacing.
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Old Feb 25, 2011 | 12:12 PM
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Re: bump stops

Originally Posted by 84 z28
Only reason you should be cutting the bump stop area out is to gain clearance for wider rims. I did a write up a while ago with pics. Just do a search for 15x10 rims with 6.5 backspacing.
True. Forgot about stuffing big wheels. But this involves cutting more than just the bump stop as well.
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Old Feb 25, 2011 | 12:19 PM
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Re: bump stops

This is what I had to do to put in a 15x10 6.5 BS rim with a 275/60/15 tire.

https://www.thirdgen.org/forums/whee...get-15x10.html
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Old Feb 25, 2011 | 01:00 PM
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Re: bump stops

Originally Posted by 84 z28
Only reason you should be cutting the bump stop area out is to gain clearance for wider rims. I did a write up a while ago with pics. Just do a search for 15x10 rims with 6.5 backspacing.
Only reason? I will politely tell you this is bad information you are giving.

Of course you need to cut the bumpstops if the car is lower otherwise you will have no suspension travel and will be jarring the bumpstops in the rear. The only other thing that makes contact is the aftermarket Tqarms where they attach to the diff- HOWEVER, this area will clearance itself adn punch a perfectly shaped hole in the floorboead up under the rear seat that you can eiter leave alone, or cover with sheetmetal, cover with dynomat etc, or cover with fiberglass.

The bumpstops need to be trimmed it rear stagnant rde height is under 26.5". Mine rode at 25 7/8" and I had to clearance them by 1st) shaving them in half vertically, and 2nd) retapering the sides into the original shape of a pyramid with a rotory sander to get the top surface area more of a point rather than a blunt impact.
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Old Feb 25, 2011 | 01:18 PM
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Re: bump stops

My car is lowered 1.75" from the stock ride height and i never had a problem with the suspension travel, torque arm or the bump stops. I had to remove them for clearence for the rim.
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Old Feb 25, 2011 | 01:41 PM
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Re: bump stops

Found answer.

Last edited by hartsmike; Feb 25, 2011 at 01:45 PM. Reason: found answer
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Old Feb 25, 2011 | 01:42 PM
  #9  
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Re: bump stops

I've heard lots about them on aftermarket wheels on both third and fourth gens.
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Old Feb 25, 2011 | 01:44 PM
  #10  
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Re: bump stops

Originally Posted by 84 z28
This is what I had to do to put in a 15x10 6.5 BS rim with a 275/60/15 tire.

https://www.thirdgen.org/forums/whee...get-15x10.html

Good pics!! So, is it for the wider wheels to fit or the suspension to allow the axle up further?
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Old Feb 25, 2011 | 02:06 PM
  #11  
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Re: bump stops

Originally Posted by 84 z28
My car is lowered 1.75" from the stock ride height and i never had a problem with the suspension travel, torque arm or the bump stops. I had to remove them for clearence for the rim.
Me too. I was on Eibach Sportlines for a while and never had a very harsh ride because of the bumpstops. My Spohn torque arm is definitely making contact though.
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Old Feb 25, 2011 | 02:14 PM
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Re: bump stops

Originally Posted by 84 z28
My car is lowered 1.75" from the stock ride height and i never had a problem with the suspension travel, torque arm or the bump stops. I had to remove them for clearence for the rim.
And still you come back into here with your naiveness.

Let me ask you the oh so obvious then. Since you never had this problem and this works for you then you have a right to list a fact that the ONLY reason to remove the bump stops is for wider 15x10 wheels? Just because you aren't low enough to hit them with your 1.75" lower then NOBODY ELSE WILL EVER? Are you kidding me?

Partner, your car is a 4x4 compared to mine. My car would turn circles on yours in a way that you have no comprehension of. You have no cluye what you are talking about when you try and post your INACCURATE facts and then come back into here defending them. You are wrong, these cars can and do hit them it not properly reengineered adn with great ride quality that low if done correctly....but you know nothing of that since you have never done this...but hey, your car is 1.75" lowered....lowered from what, a power wagon ride height?
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Old Feb 25, 2011 | 02:16 PM
  #13  
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Re: bump stops

Originally Posted by hartsmike
Good pics!! So, is it for the wider wheels to fit or the suspension to allow the axle up further?
I didn't experience anything that Vetruck stated but you can apply it to both situations.
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Old Feb 25, 2011 | 02:19 PM
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Re: bump stops

Originally Posted by 84 z28
My car is lowered 1.75" from the stock ride height and i never had a problem with the suspension travel, torque arm or the bump stops. I had to remove them for clearence for the rim.
Wrong. Your car just rode like crap and you didn't know it was because of the bumpstops. You were hitting the bumpstops on every imperfection. Mine rode like crap too until I trimmed my rear bumpstops.

With stock springs there is less than 2" of travel before the bump stops hits. If you are really lowered 1.75" you only had 0.25" of rear suspension compression travel.
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Old Feb 25, 2011 | 02:22 PM
  #15  
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Re: bump stops

Originally Posted by Vetruck
And still you come back into here with your naiveness.

Let me ask you the oh so obvious then. Since you never had this problem and this works for you then you have a right to list a fact that the ONLY reason to remove the bump stops is for wider 15x10 wheels? Just because you aren't low enough to hit them with your 1.75" lower then NOBODY ELSE WILL EVER? Are you kidding me?

Partner, your car is a 4x4 compared to mine. My car would turn circles on yours in a way that you have no comprehension of. You have no cluye what you are talking about when you try and post your INACCURATE facts and then come back into here defending them. You are wrong, these cars can and do hit them it not properly reengineered adn with great ride quality that low if done correctly....but you know nothing of that since you have never done this...but hey, your car is 1.75" lowered....lowered from what, a power wagon ride height?
You have some serious issues with your holyer then thou attitude. As I stated my car is lowered 1.75" from factory ride height. And i could care less that your car can turn better then mine. My car and your car were made for 2 different things obviously. You have no clue where my ride height was before and you have no clue how low it is now.
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Old Feb 25, 2011 | 02:24 PM
  #16  
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Re: bump stops

Originally Posted by 87350IROC
Wrong. Your car just rode like crap and you didn't know it was because of the bumpstops. You were hitting the bumpstops on every imperfection. Mine rode like crap too until I trimmed my rear bumpstops.

With stock springs there is less than 2" of travel before the bump stops hits. If you are really lowered 1.75" you only had 0.25" of rear suspension compression travel.
My car never rode like crap and never hit the bump stops. Nor were my springs worn as they were replaced after i purchased the car.
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Old Feb 25, 2011 | 02:29 PM
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Re: bump stops

Originally Posted by 84 z28
My car never rode like crap and never hit the bump stops. Nor were my springs worn as they were replaced after i purchased the car.
Who said anything about worn springs. Sorry but there is no way you can tell me the bump stops never hit if you only have 0.25" of travel. What rate springs were you running in the back?
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Old Feb 25, 2011 | 02:35 PM
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Re: bump stops

Oh, Imma gonna have fun with this guy....

Ok brain surgeon. Here's your car from the other post with Mickey T tires that are 275/60-15 with an overall height of what? gee 28"? wow low already. Then look at the picture where it shows you tire tucked under the fender well with a joe dirt ride height of maybe another 4" gap between the tire and fender lip? now we are at 32" to fender lip.

And then you state: You have no clue where my ride height was before and you have no clue how low it is now. Today 12:19 PMYou have no clue where my ride height was before and you have no clue how low it is now. Today 12:19 PM"You have no clue where my ride height was before and you have no clue how low it is now"

Well Alex Trebek, the question is:What is 1.75" higher than you have now"?

Trebek," Yes, you are amazing"
me" Well Alex, the brain surgeon did state that answer right up top a few posts where he shows a picture and a tire size and then states the obvious that its now 1.75" lower.

Ain;t stupid fun?

Last edited by Vetruck; Mar 29, 2011 at 11:58 PM.
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Old Feb 25, 2011 | 02:43 PM
  #19  
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Re: bump stops

Originally Posted by Vetruck
Oh, Imma gonna have fun with this guy....

Ok brain surgeon. Here's your car from the other post with Mickey T tires that are 275/60-15 with an overall height of what? gee 28"? wow low already. Then look at the picture where it shows you tire tucked under the fender well with a joe dirt ride height of maybe another 4" gap between the tire and fender lip? now we are at 32" to fender lip.

And then you state: You have no clue where my ride height was before and you have no clue how low it is now. Today 12:19 PMYou have no clue where my ride height was before and you have no clue how low it is now. Today 12:19 PM"You have no clue where my ride height was before and you have no clue how low it is now"

Well Alex Trebek, the question is:What is 1.75" higher than you have now"?

Trebek," Yes, you are amazing"
me" Well Alex, the brain surgeon did state that answer right up top a few posts where he shows a picture and a tire size and then states the obvious that its now 1.75" lower.

Ain;t stupid fun?
LOL your a moron. That pic is before the lowering springs.
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Old Feb 25, 2011 | 02:50 PM
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Re: bump stops

Originally Posted by 84 z28
LOL your a moron. That pic is before the lowering springs.
Ok Im the moron, I will accept that. So now lets recalculate.

32" fender lip MIIINNUUUSSS 1.75" rrriiiigggghhhttt? equals 30 1/4" fenderlip. Its a far cry from my 25 7/8" fenderlip.

Like I said, you have no clue. If your factory bumpstops were still on their (not to mention the compromised integrity of your chassis) you would still have 3 3/4" travel until you touch the factory bumpstop.

You have a lowered car? Maybe for Arkansas hillbilly standards, but I have no clue about that. I am sure you will enlighten us further.
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Old Feb 25, 2011 | 02:51 PM
  #21  
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Re: bump stops

Look at the big 4" wheel gap.

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Old Feb 25, 2011 | 02:52 PM
  #22  
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Re: bump stops

Originally Posted by Vetruck
And still you come back into here with your naiveness.

Let me ask you the oh so obvious then. Since you never had this problem and this works for you then you have a right to list a fact that the ONLY reason to remove the bump stops is for wider 15x10 wheels? Just because you aren't low enough to hit them with your 1.75" lower then NOBODY ELSE WILL EVER? Are you kidding me?

Partner, your car is a 4x4 compared to mine. My car would turn circles on yours in a way that you have no comprehension of. You have no cluye what you are talking about when you try and post your INACCURATE facts and then come back into here defending them. You are wrong, these cars can and do hit them it not properly reengineered adn with great ride quality that low if done correctly....but you know nothing of that since you have never done this...but hey, your car is 1.75" lowered....lowered from what, a power wagon ride height?
I have read countless post of you being big headed, and down right obnoxious over how fast your little v6 camaro is through the bends, and how your the best goddamn driver in the world . Keep your ego on the track like everyone else.
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Old Feb 25, 2011 | 02:56 PM
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Re: bump stops

Originally Posted by 84 z28
Look at the big 4" wheel gap.

You have a 28" tall tire on there and you can see its flush at the very least with the fender lip. So at minimum you have 1 1/2" travel before you hit the factory bumpstop, I will say more like 2 to 2 1/2" since It looks like about a 1/2 to 1" gap (picture is dark but I ca definately see tread so its not lower than the tire height.

THis post is about bumpstops and people needing to reshape them for lowered cars...Or did you not understand that point of topic?

Last edited by Vetruck; Feb 25, 2011 at 03:00 PM.
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Old Feb 25, 2011 | 02:57 PM
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Re: bump stops

Originally Posted by 89rs454
I have read countless post of you being big headed, and down right obnoxious over how fast your little v6 camaro is through the bends, and how your the best goddamn driver in the world . Keep your ego on the track like everyone else.
Ya stick around TGO long enough in the days span and you make all kinds of new friends...Hi

I post facts and stats, If that makes me arrogant in your opinion? I can't help your insecurity.
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Old Feb 25, 2011 | 03:03 PM
  #25  
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Re: bump stops

Originally Posted by 84 z28
Look at the big 4" wheel gap.

The rear of that car isn't lower than stock. No way.
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Old Feb 25, 2011 | 03:07 PM
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Re: bump stops

Originally Posted by 87350IROC
The rear of that car isn't lower than stock. No way.
Yep, Take away the 28" tall tire and put the factory 25.7 and he will have very close to the 4" wheel gap I listed. How Ironic isn't it if that car really is sitting at 30 1/4" fenderlip
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Old Feb 25, 2011 | 03:08 PM
  #27  
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Re: bump stops

Originally Posted by Vetruck
Yep, Take away the 28" tall tire and put the factory 25.7 and he will have very close to the 4" wheel gap I listed. How Ironic.
Agreed.
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Old Feb 25, 2011 | 03:11 PM
  #28  
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Re: bump stops

Originally Posted by 87350IROC
Agreed.
Watch it there partner, You are stepping very close to being arrogant also if you agree with me...
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Old Feb 25, 2011 | 03:18 PM
  #29  
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Re: bump stops

Originally Posted by Vetruck

I post facts and stats, If that makes me arrogant in your opinion? I can't help your insecurity.
Anybody that has to always brag on a forum to boost there insecure self esteem is the insecure little man.
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Old Feb 25, 2011 | 03:21 PM
  #30  
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Re: bump stops

I've made popcorn. Ball's in your court V.
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Old Feb 25, 2011 | 03:22 PM
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Re: bump stops

Originally Posted by 89rs454
Anybody that has to always brag on a forum to boost there insecure self esteem is the insecure little man.
So what is it call what you are doing right now. Show me where you help educate people around here. My contributions around here spekl for themself not to mention my credentials. Funny you say suchh things, ever check my profile link? Didn't think so or you would not have stepped on your dick

People local tp me know not to spew bullshit like you are doing or their pocketbook will be lighter. I sucker punks like you in. Lets see you post some positive info people can use, or maybe some statistics that are factual and impresive? Lets see your dick son

Last edited by Vetruck; Feb 25, 2011 at 03:26 PM.
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Old Feb 25, 2011 | 03:23 PM
  #32  
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Re: bump stops

Originally Posted by Vetruck
THis post is about bumpstops and people needing to reshape them for lowered cars...Or did you not understand that point of topic?
This post isnt about reshaping bump stops for lowered cars. The OP asked what they are, where are they and why you would remove them. What do you not understand ??

I stated what i did and actually agreed with you in my other post but you keep talking just to hear yourself talk.
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Old Feb 25, 2011 | 03:27 PM
  #33  
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Re: bump stops

Originally Posted by Vetruck
So what is it call what you are doing right now. Show me where you help educate people around here. My contributions around here spekl for themself not to mention my credentials. Funny you say suchh things, ever check my profile link? Didn't think so or you would not have stepped on your dick

People local tp me know not to spew bullshit like you are doing or their pocketbook will be lighter. I sucker punks like you in.
I'm just stating facts and stats
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Old Feb 25, 2011 | 03:28 PM
  #34  
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Re: bump stops

Originally Posted by Base91
I've made popcorn. Ball's in your court V.
Didn't know I was so entertaining for you. you have something to say about bumpstops?
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Old Feb 25, 2011 | 03:32 PM
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Re: bump stops

Originally Posted by 84 z28
This post isnt about reshaping bump stops for lowered cars. The OP asked what they are, where are they and why you would remove them. What do you not understand ??

I stated what i did and actually agreed with you in my other post but you keep talking just to hear yourself talk.
Can you read?

Lets quote the opening post about cutting bumpstops- What on god's green earth do you think cutting referes to? duh reshaping maybe you cut the rubber and reshape it, you don;lt remove it...
[ "I've read lots about cutting bump stops but don't know what they are, where they are and what it does to cut them and how to cut them...

Can anybody give me this information?

Thanks "]

For the RECORD, I am the ONLY PERSON to answer the original question on this thread so far. I even gave the ride height they can go safely until the bumpstops need reshaping..
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Old Feb 25, 2011 | 03:49 PM
  #36  
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Re: bump stops

Originally Posted by Vetruck
Didn't know I was so entertaining for you. you have something to say about bumpstops?
Apart from your great vehicle knowledge and enormously instructive posts your occasional spats with some other members is often very entertaining. Long live TGO.
But to keep it on topic: I think that if you don't know what bump stops are or where they are or what they do then maybe you shouldn't be modifying your suspension until you do.
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Old Feb 25, 2011 | 04:34 PM
  #37  
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Re: bump stops

Originally Posted by Vetruck
Can you read?


For the RECORD, I am the ONLY PERSON to answer the original question on this thread so far.
That's what it was. Keep trying pat yourself on the back. You might have a contributed something but your not the only person. Cutting out the bump stops and reshaping are two different things. Cutting out means the bump stop is gone, reshape means to rework or shape differently. Keep trying.
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Old Feb 25, 2011 | 06:18 PM
  #38  
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Re: bump stops

Getting back on topic, my car with stock tire size and stock rear suspension was 27.5" on the rear left and 28" on the rear right. It WOULD hit the bump stops.

Now, with new stock height springs and new rear shocks, the car sits at 28.5" on both sides. It doesn't hit the bump stops unless there is some obscene crater in the road.

If you're wondering what bump stops are, get down on the ground behind the rear wheels and take a look for a triangle shaped rubber block. Once the car compresses down, the bump stop will prevent the car from going down any farther. Pretty much the suspension of last resort.

Here is a picture of my stock bump stop. (still on there, picture is a few years old.....to the left of the spring). That is the driver's side rear tire.



Not much room for suspension travel if you have lowering springs. I can't say for sure that people who have 1.75" lowering springs are or aren't hitting the bump stops as I haven't tried it. But even Eibach has said that their Sportline springs are meant to use the bump stops due to their soft spring rate. I suspect this is why a lot of people on TGO complain about poor ride quality with Eibach Sportline springs.
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Old Feb 28, 2011 | 08:06 AM
  #39  
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Re: bump stops

So... Removal of the bump stop allows the chassis of the car to travel further "down"? Will that allow the car to bottom out in spost such as the tank etc....?
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1HotZ28&SS
Suspension and Chassis
3
Sep 28, 2015 08:58 PM




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