Dangerous tyres

h3000

So there I was at my local tyre centre today waiting for my job to be done next thing I see this tyre hanging up on the wall. Apparently it was under someones car.
How the fuk can people drive around with crap like this on their cars?:eek:

langdang

I assume that's the result of an evenings drifting/diffing, otherwise :eek:

bazz26

F1 style slick tyres.

KamiKazi

Sure we never get rain here anyway.

A-Trak

If you can legibly write your name on the tyre, it's time to change them.This is obviously how Daithí know when to visit quik-fit Very handy method alright.

h3000

Apparently the guy was stopped by the Gardai with this tyre along with two others nearly as bald under the car. He was given a week to get them replaced.
Should have been taken of the road straight away I say.

cantdecide

Last year I saw a pair in that same condition on the front of a std 97 Fiesta with a baby's seat in the back...

For what is wrong with some, there is no cure.

staker

I'd imagine the R word would have an impact on owners not renewing their tyres on time either.

Fatswaldo

As OP commented, thats down to drifting etc. You'd never see tyre wear that even to such a depth. When I worked in a tyre fitters years ago I sar tyress down to the canvas - oul lad who was driving was wondering why the car seemed bumpy. One guy worked in a haulage company who retreaded their tyres (usual practice) - he used the retreader on his car tyres and wondered why the guards were laughing at him and sent him to us. Another customer wondered why their brakes were so bad - she had no front discs! Days before NCT - they were some wrecks on the road!

KamiKazi

staker wrote: »

I'd imagine the R word would have an impact on owners not renewing their tyres on time either.

Rubber?

Maybe, but rubber is probably the best material for tyres...

langdang

staker wrote: »

I'd imagine the R word would have an impact on owners not renewing their tyres on time either.

Is a 6 letter R word? Does it end with "d" ?

h3000

Fatswaldo wrote: »

As OP commented, thats down to drifting etc.

I'm sure it was. It still doesn't take away from the fact some one was driving around on a public road with tyres in this condition.

Fatswaldo

Fatswaldo wrote: »

Another customer wondered why their brakes were so bad - she had no front discs! Days before NCT - they were some wrecks on the road!

As in very worn front discs ?

CiniO

Disregarding the law aspect, and overall safety, that kind of tyre provides even better grip then the brand new one, on a dry clear flat surface.

KamiKazi

CiniO wrote: »

Disregarding the law aspect, and overall safety, that kind of tyre provides even better grip then the brand new one, on a dry clear flat surface.

Hi,

Welcome to Ireland.

CiniO

KamiKazi wrote: »

Hi,

Welcome to Ireland.

Heh maybe that guy, was using his car only when it was not raining!!!.
You never know

Tragedy

Normal worn tyres don't give such a smooth surface, that has to be down to drifting/track days.

Tea 1000

CiniO wrote: »

Disregarding the law aspect, and overall safety, that kind of tyre provides even better grip then the brand new one, on a dry clear flat surface.

No, it doesn't.
The reason you probably posted that is because you're using the logic that the more area of rubber you have on the road the better the grip, but you're leaving out the quality of the rubber in question that's in contact with the road. When a normal road tyre is worn to that level, all the good quality grippy rubber is worn away, and that harder stuff is left, which offers f**k all grip.
Just because it looks like a slick, doesn't mean it behaves like one.

staker

KamiKazi wrote: »

Rubber?

Maybe, but rubber is probably the best material for tyres...

langdang wrote: »

Is a 6 letter R word? Does it end with "d" ?

Recession lads!!
A new set of 205 55 16's (or whatever they were)mightn't have hurt that lads pocket as much 2/3 years ago.

Tea 1000

staker wrote: »

Recession lads!!
A new set of 205 55 16's (or whatever they were)mightn't have hurt that lads pocket as much 2/3 years ago.

However a new set of 205 55 16's would hurt the pocket a lot less than a serious car crash, which is quite likely on those things!

Tea 1000

Tea 1000 wrote: »

No, it doesn't.
The reason you probably posted that is because you're using the logic that the more area of rubber you have on the road the better the grip, but you're leaving out the quality of the rubber in question that's in contact with the road. When a normal road tyre is worn to that level, all the good quality grippy rubber is worn away, and that harder stuff is left, which offers f**k all grip.
Just because it looks like a slick, doesn't mean it behaves like one.

Spot on, the rubber of that tyre would not grip very well on any road surface even at really high temps.

feelites

that might be strange for yaz but thread is less important than the rubber

had an occasion to drive the car with completely bald tyres and on the other hand drove the same car with diffirent brand tyres with legal thread

bald tyres had much better grip whatsover in the dry or wet conditions!


its all about the rubber ladz

Tragedy

feelites wrote: »

that might be strange for yaz but thread is less important than the rubber

had an occasion to drive the car with completely bald tyres and on the other hand drove the same car with diffirent brand tyres with legal thread

bald tyres had much better grip whatsover in the dry or wet conditions!


its all about the rubber ladz

No, it's about rubber and thread pattern. Try some expensive summer tyres in wet weather, enjoy aquaplaning and over/understeering like a mad thing.

feelites

feelites wrote: »

that might be strange for yaz but thread is less important than the rubber

had an occasion to drive the car with completely bald tyres and on the other hand drove the same car with diffirent brand tyres with legal thread

bald tyres had much better grip whatsover in the dry or wet conditions!


its all about the rubber ladz

cheers for that

golden8

I now look at taxi tyres before I get into them. I was replacing my tyres that still were legit thread level. Saw a taxi replacing his tyres all four were bald and he was moaning how expensive the cheapest tyre was. Needless to say I wont be getting into his taxi.

Mr.David

Tea 1000 wrote: »

No, it doesn't.
The reason you probably posted that is because you're using the logic that the more area of rubber you have on the road the better the grip.

Which as you eluded to is of course incorrect.

friction is independent of surface area. F=uN.

So if that same tyre was twice as wide it still wouldnt have any more grip :P

gofaster_s13

Tragedy wrote: »

Normal worn tyres don't give such a smooth surface, that has to be down to drifting/track days.

Drifting and track days tend to leave the tyres ragged, I've often seen tyres come through the test centre here like that, I don't even bat an eyelid any more, just fail it straight away.

CiniO

Tea 1000 wrote: »

No, it doesn't.
The reason you probably posted that is because you're using the logic that the more area of rubber you have on the road the better the grip, but you're leaving out the quality of the rubber in question that's in contact with the road. When a normal road tyre is worn to that level, all the good quality grippy rubber is worn away, and that harder stuff is left, which offers f**k all grip.
Just because it looks like a slick, doesn't mean it behaves like one.

Actual area of contact with road has nothing to do with it.
It's actually basic physics, that friction doesn't depend on the area of contact.
The quality of rubber also isn't worse. It's the same throughout all the tyre depth. (unless you are using retreaded tyres).
It's just tread that's causing worse grip on dry surface, so always tyre with flat surface (slick or even something like we've seen on the picture here) will get worse grip. Tread when it's full - bends and causes tyre to get worse grip on dry surface comparing to the situation here - no tread.
Only problem arises on muddy, sandy, wet, etc surface.
Even a very small bit of water on the road, can cause aquaplanning with such a tyre, becuase there isn't anything which can get this water for underneath the tyre (normally tread does it).

I'm not speaking just a pure words.
I drove good few times with similar tyres to the ones from the pictures, and on dry surface they are even better then new ones. Definitely not worse though.
On wet surface, they can easily behave the same as on ice.

Tragedy

Mr.David wrote: »

Which as you eluded to is of course incorrect.

friction is independent of surface area. F=uN.

So if that same tyre was twice as wide it still wouldnt have any more grip :P

It's not that simple.

Firstly, there's two types of friction applicable to tyres. Secondly, you're ignoring(or not aware of) how stickiness affects friction(and tyres, when heated up, do have a very very slight stickiness).

Hotwheels

Francis Melia has told me horror stories about tyres he's replaced, has some on the walls of his garage.

Better still, the ones he's been asked to repair would make the hair on yer head stand up:eek:

It boggles the mind that people would drive with them on, but they do...

CiniO

Tragedy wrote: »

It's not that simple.

Firstly, there's two types of friction applicable to tyres.

I can think of three types of friction when it comes to tyres.
Static friction, dynamic friction, and rolling resistance.

Mr.David

Tragedy wrote: »

It's not that simple.

Firstly, there's two types of friction applicable to tyres. Secondly, you're ignoring(or not aware of) how stickiness affects friction(and tyres, when heated up, do have a very very slight stickiness).

Yes, I oversimplified it but it is true. I am aware of static and dynamic friction, assuming thats what you mean. And the temperature effects. Obviously u isnt constant and is temp dependant.

The main reason why wider tyres result in more grip is that the wider the tyre the softer the compound the manufacturer can use and still achieve the same wear rate. Plus some temp/profile related issues.

Fatswaldo

RoverJames wrote: »

As in very worn front discs ?

As in no discs at all. Calipers were there but someone had just removed the discs at some stage - I kid you not!

Tragedy

CiniO wrote: »

I can think of three types of friction when it comes to tyres.
Static friction, dynamic friction, and rolling resistance.

Static friction and dynamic friction are both Dry Fiction :pac:

The main reason why wider tyres result in more grip is that the wider the tyre the softer the compound the manufacturer can use and still achieve the same wear rate. Plus some temp/profile related issues.

I would doubt the main reason is softer compound, although it can be one of the reasons(depends on the individual tyre though, they're all different. In the case of track tyres, the main reason is softer compound.).

Temperature(wider dissipates heat quicker), low profile resulting in less deformation, improved contact patch shape(wide rather than long) and a few other things!

Fatswaldo

Fatswaldo wrote: »

As in no discs at all. Calipers were there but someone had just removed the discs at some stage - I kid you not!

:eek:

She only had rear brakes, f***, frightening, what kind of an utter f***tard would do that to a car. Did they cable tie the calipers to the shocks or something ?

mullingar

Would the caliper piston not have popped itself out of the housing as it would not have the length to reach the probably "worn to metal" pads?