Suspension/Wheels/Tires/Brakes

Bald spots on tires after hard braking!

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Old Jul 4, 2006 | 06:40 PM
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Bald spots on tires after hard braking!

I had to do a 100mph to 5mph as quickly as possible without ABS. All 4 wheels locked up the entire time.

I've got bald spots on all 4 tires and now car vibrates

If I ignore the problem, will the tires 'even out' over time?

Will this happen to new tires? I don't have ABS.

I searched on www.tirerack.com and found 2 likely replacements. General all around tires for ~$60 each and summer performance tires for ~$80. How fast the summer performance tires wear out is not an issue, but I am concerned if there is any noticeable increase in road tire noise in cabin? This is supposed to be the comfortable and quiet DD!

Any help is appreciated!
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Old Jul 4, 2006 | 07:32 PM
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They're flat spots. Wear out over time? I'm not sure, but you're going get horrible vibration if the flat spot is really big. I'm fur that 80 dollar summer performance tires are still on the conservative side as far as tires go. Pretty sure they'll be fine, just don't try to push your car to hard until you've got some better rubber under it.
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Old Jul 4, 2006 | 08:10 PM
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I was considering these 'Summer performance' tires over the regular all weather tires.

Seems like they will fit...

Will they flat spot if I lock up all 4 tires again?

Last edited by Syncro; Jul 4, 2006 at 08:12 PM.
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Old Jul 4, 2006 | 11:32 PM
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any time you lock up a tire it's going to flat spot it to some degree. its just grinding off rubber as it drags on the ground... if you lock the wheels, there's no way around it, learn to brake properly without abs
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Old Jul 5, 2006 | 01:30 PM
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If you have enough meat beneath the flat spot to make it worth it, you may be able to get your tires shaved and get some more life out of them. Tire shaving isn't a common service any more so you may have to call around to a few tire shops but that should bring the tire into round again..
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Old Jul 6, 2006 | 12:45 AM
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In theory harder all seasons should be more resistant to flat spotting, as it should take longer to grind off a given amount of tread, BUT a high performance summer tire will have more grip and will be harder to lock up inadvertantly, meaning you're less likely to get flat spots in the first place.

Whenever you lock up the tires you should immediately (and smoothly) release brake pressure untill the tires regain grip (start spinning again), then you can increase your brake pressure again.
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Old Jul 6, 2006 | 08:41 AM
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Originally Posted by Syncro
I had to do a 100mph to 5mph as quickly as possible without ABS. All 4 wheels locked up the entire time.

This statement is an oxymoron, and is the root of your problem.
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Old Jul 6, 2006 | 01:32 PM
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Originally Posted by drago86
This statement is an oxymoron, and is the root of your problem.
I'll admit I was too scared to try and threshold brake, but it's not something you can do properly without practise. Before putting on new tires I should teach myself...
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Old Jul 8, 2006 | 11:51 PM
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Your flat spot will get worst over time. The tires will have the tedency to try to stop rotating at the flat spot under hard braking.
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Old Jul 9, 2006 | 02:53 AM
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Yup, it happens. .. I think it happens when your brakes are warped, too.
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Old Jul 9, 2006 | 08:46 AM
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Originally Posted by eatmyclutch
Yup, it happens. .. I think it happens when your brakes are warped, too
Warped brakes typicall make the car feel like it's braking unevenly as if it's grabbing-sliding-grabbing etc. Your tire looks like that was caused by camber issues or the tire rubbing hard against the fender.
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Old Jul 9, 2006 | 02:15 PM
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eatmyclutch: I agree that the wear looks more like camber wear than a flat spot. A flat spot will look more like somone ground off a chunk of the tire, in one, large flat area, not all along the edge of the tire. Also REPLACE THOSE TIRES NOW!!! (assuming it's a current pic) They could blow out any minute. Anytime you see tire cords you have been driving on the tire WAY too long.

Warped brake rotors, from my experience (test driving an FC with badly warped front rotors), will give you a pulsating pedal and will make it much harder to stop quickly because of that.
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Old Jul 31, 2006 | 12:09 AM
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I'm an idiot

I did it again. Tires had 40 miles on them before I had to slam on the brakes on the highway (no I wasn't tailgating)! Mild flatspotting occured - I tried to threshold brake a bit. Vibration is barely noticeable but it's there

$450 dollars worth of Yokohama AVS-100 summer tires ruined - @$(*&$(*!(*^%

I will take the car to a desolate road I know and learn how to brake without ABS like a real man. Stupid stupid stupid
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Old Jul 31, 2006 | 01:14 AM
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dude... you need to go learn to brake... and to not follow people so closely.... :?

also, if you got the road hazard warranty, it 'might' cover that if you don't tell them 'why' they're flat spotted. but its worth a try at least.
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Old Jan 4, 2007 | 01:22 PM
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I've since swapped tires with ones known to be fine and the vibrations still haven't left.

What could it be?

HELP
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Old Jan 4, 2007 | 01:30 PM
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From: lexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumberonelexaninumb
lol
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Old Jan 4, 2007 | 03:27 PM
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Originally Posted by Syncro
I've since swapped tires with ones known to be fine and the vibrations still haven't left.

What could it be?

HELP
alot of things could cause vibration while driving or braking

bad rotors
bad alignment
bent/warped/aged suspension parts (like bushings)
bent/dented wheel(s)
bad tires

etc. you'll have to ask yourself what you've done recently that might cause these problems.

seriously i don't know how people drive where you are, but i rarely have to brake hard in normal traffic, even in emergency situations. maybe you need to increase your following distance... ?
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