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When do tyres lose their edge in the wet? - Lud
Batting down to the country and back this weeked in variable, wettish weather, with the old jalopy running sweetly on the cold wet air, I thought I noticed its natural understeer had become worse, with the front letting go a couple of times on tight roundabout turns. I thought perhaps I had been a bit sudden with the steering and/or allowed the tyres to lose a bit of pressure. Sure enough, when I checked before coming back, they were down a couple of pounds all round. But the front end grip was still not as good as I seemed to remember it.

Both front tyres are about a year old and appear virtually as new on the tread. But the fine cuts or sipes present in new tyres never last all that long, and they make a lot of difference in the wet. The tyres cost about £30 each from a proper one-man tyrefitter in Bayswater, where many fine motors live. I can't remember what make they are, but not one of the leading traditional makes.
When do tyres lose their edge in the wet? - skorpio
I've noticed it lately with my Pug which is running on Michelins with plenty of tread. I know after a dry spell the roads can get greasy after a spell of rain.

Perhaps roundabouts are more prone to oil and diesel spills when it slops out of vehicles gound round them?
When do tyres lose their edge in the wet? - Lud
Yes, but we haven't had that long a dry spell. Road surface condition is pretty important too. Heavily trafficked roundabouts do get their surfaces abraded, so that what is left is often a very rough area with the tarmac worn away and the ballast stones sticking up out of it. Ideally calls for special short-lived qualifying stickies...:o}
When do tyres lose their edge in the wet? - Alby Back
You know Lud, I think it's about perception. Dry grip is so good nowadays that we have all become very used to taking corners faster. I can remember ( as I'm know you will )when you really had to get your entry speed well down to avoid embarrassment. Especially on cross plys.
When do tyres lose their edge in the wet? - Lud
You had to get your entry speed well down to avoid flying off into the scenery. But not so far down as to avoid a bit of sideways, surely? Handling on crossplies was a joy, so predictable and progressive...

Yes, dry grip in modern repmobiles is pretty good, and tyre squeal only occurs in corners under very dire provocation these days. But I don't think I have been misled by that. There has definitely been a slight falling-off of wet grip, whose limits I like to approach and occasionally cross in normal driving just to keep myself awake among all the mimsers.
When do tyres lose their edge in the wet? - martint123
Being a rider as well as a driver, you become attuned to the greasyness of roundabouts.
Diesel sloshing out of HGVs and Buses is truly evil stuff with a light scattering of water on top. It doesn't take much and doesn't wash away in heavy rain.
When do tyres lose their edge in the wet? - Pica
Takes me back to a couple of years ago when I was doing around 50MPH on a dual carriageway and the lights changed to amber and I had to brake fairly heavily to stop but the car just skidded on through the red light and I could do nothing at all to stop the tyres had obviously picked up diesel and were slippy for a couple of miles after (luckily nobody was coming the otherway and there was no camera).

Edited by Pica on 11/08/2008 at 16:30

When do tyres lose their edge in the wet? - Lud
Perhaps diesel has something to do with it, there being more and more diesel cars... but fuel doesn't usually slop out of cars on corners, although I have seen it literally pouring out of lorries a couple of times. I agree that diesel is evil stuff on roads, with or without rain to emulsify it. One of many reasons why I am scared of motor bikes. Pica's story, only too believable, makes one's blood run cold. My car like Pica's (presumably) doesn't have ABS which might help a bit in that situation if it was working properly, which it might not be in my experience. But no grip is no grip, ABS or no.
When do tyres lose their edge in the wet? - FotheringtonThomas
Another issue could be spilt diesel or somesuch on the road (yes, I know, people would've been out mopping it up to sell on!). I remember coming out of a pub. over a roundabout on the M4, Hell's Angels were in the road shouting "Oil! Oil!" ay passing motorcyclists. My sidecar outfit zoomed around drifting at all angles, just like in the snow, great fun. Not so much fun in a car or on a solo motorbike, though.
When do tyres lose their edge in the wet? - gordonbennet
For many years now, i've been buying tyres primarily on getting the best wet grip possible, especially in the winter, in fact i've removed a set of perfectly good high quality tyres from my elderly MB as the tyres suffered from 2 problems, they took around 3 or so miles to get rid of the overnight flat spots, and the appalling wet grip until warmed up.

I think Humph makes an interesting point, modern cars and their tyres can corner at tremendous speeds in the dry, very little roll, car designed to understeer constantly as apparently if anyone should oversteer again the world will stop.
All this changes so drastically when wet and greasy conditions come into play, a much bigger change than the sorts of grip levels that were available on the cars that most of us learned on, cars that had to be driven, not just pointed.

Feeling the lightness and recognising that things are not responding the same Lud, i wonder if a young less experienced buck would even have been aware of slippery conditions, having probably been brought up on cars far too capable?


When do tyres lose their edge in the wet? - Lud
It's what I meant about crossplies gb. You knew they didn't grip all that well even in the dry, but if you tiptoed around on the edge of serious slip angles just for the fun of it you very seldom got badly caught out. With modern radials, as you say, dry grip is very high indeed with slip angles you hardly notice in most cars, and wet grip is also much better, but radials let go much more suddenly and I guess the first time it happens to a modern young driver it might cause a bit of alarm.

Of course, touch wood, one doesn't expect to hit another car or anything unyielding when simply pootling, albeit briskly, about on the road. Like other drivers I have learned to keep an eye (and ear, and fingertips, and seat of pants) on road surfaces so I often know what to expect. But I think there are many drivers out there who think it's on rails like a train, and may be embarrassingly or even dangerously taken aback and dismayed when they find out all of a sudden that it isn't.

It is a great disadvantage never to have driven like a mad hooligan in your life.
When do tyres lose their edge in the wet? - Old Navy
It is a great disadvantage never to have driven like a mad hooligan in your
life.


Too true, Lud. As a young tearaway I learned how to steer a car (both front and rear wheel drive) with the throttle, although it is a skill that I have not needed in recent years it means you can feel the level of grip at any given time. Handy on water/oil/ice covered roads. I wonder how many drivers can feel the onset of aquaplaning and respond appropriately?
When do tyres lose their edge in the wet? - Old Navy
Missed the edit.

I have just replaced my front tyres at 3mm of tread remaining, they had lost their "edge".
When do tyres lose their edge in the wet? - Lud
they had lost
their "edge".


As they do...

It occurs to me that some may interpret part of one of my posts above as a recommendation to drive like a mad hooligan. It wasn't, of course. The handling limits of cars on the road should be approached with great circumspection, especially in the presence of other traffic. Any tendency to bravery should be firmly suppressed, and unless your steering and other inputs are rapid, delicate and correct (which can mean counter-intuitive), handling or adhesion limits should be given a very wide berth. Much better safe than very, very sorry. You can't really depend on luck so management is the answer.

Of course this is preaching to the converted here.
When do tyres lose their edge in the wet? - quizman
Lud, what do you expect from tyres that cost £30?

If you want good wet grip get some decent ones, like Michelin, Goodyear, Continental, Pirelli etc.

If anyone is wondering why I'm posting so much today, well it's wet and I can't combine my barley. That's with a Claas combine with a Perkins engine with Michelin tyres.

Edited by quizman on 12/08/2008 at 17:53

When do tyres lose their edge in the wet? - Lud
Bangernomics qz... the car only cost £250 and that was four years ago.

As I said, the tyres came from a proper tyrefitter recommended by my indy mechanic. He could certainly have supplied wonderful sporting stickies, at a price, if that had been what I wanted. But nor are the tyres he sold me rock-bottom stiff-compound everlasting noisy no-grip cheapos. They are respectable budget boots.
When do tyres lose their edge in the wet? - quizman
Sorry Lud, no offence meant, but if you shop around you can get some good deals.

A pal has an Avensis with cheapo Russian and Chinese tyres which were very noisy. He replaced them with Premiun Contacts and is very pleased with the result.

Edited by quizman on 12/08/2008 at 18:01

When do tyres lose their edge in the wet? - yorkiebar
I knew the "anti cheap tyres brigade" would make a comment on this sooner or later.

Its all relative. A cheap tyre can be plenty good enough, if not driven to extreme limits etc. But even a cheap tyre (or should probably put even an expensive tyre) will have a change in its performance level at some point. Its the change in level that is the question I believe, not what is the ultimate grip tyre?

All tyres (whatever brand/style) will have different performance characteristics. Some better in dry, some rain, some snow, some cold etc etc. All tyres are a compromise for all year round conditions.

The anti cheap tyre comments have to be taken into context too. A car with expensive branded tyres but poor/worn suspension bushes/components will not stop as quick as it should. A cheaply shod car with well maintained same components may well stop better!

I would far prefer to see cars with good condition cheap tyres on them than poor condition expensive branded ones. Expensive ones are often kept far too long because they are expensive to replace and are often way beyond their proper grip levels!

To see this look at any car park and actually look at some cars tyres, you will be (badly) surprised at the condition of tyres out there! Another reason for a yearly mot imo!
When do tyres lose their edge in the wet? - quizman
Yorkiebar, I agree with many of your comments, re a new cheapo is better than a bald premium one, of course it is. MOT test every year, yes please.

I would like to refer you to the Which tyre tests. The best tyres were so much better, especially in the wet, that nothing would persuade me to fit some of the nasty cheapo far eastern rubbish. I value my life and other peoples too much.

When do tyres lose their edge in the wet? - Lud
Quite yb.

I've bought a lot of tyres over the years starting in the crossply days. Some budget tyres have been absolute rubbish - I remember some knobbly ones that lasted about 10,000 miles on the back of my VW 411. Others have been noisy and lacking in grip (but you ought to try a 2CV on oversize Michelin Xs for sudden breakaway on wet cobbles, chapeau!). Had some very nice Goodyears on my last Skoda. These things on the front of the Ford, East European or Asian, are pretty good cheapish tyres entirely appropriate to my present car at its stage of life...

Forgot to mention hard-to-balance speed-limited retreads and dodgy secondhand tyres for a tenner, of which I have also had a few.

'Ever seen a cutter?' a racing mechanic once asked me with an evil grin.

Edited by Lud on 12/08/2008 at 18:29

When do tyres lose their edge in the wet? - FotheringtonThomas
All tyres (whatever brand/style) will have different performance characteristics.


Some of these may be seen on the sidewall.

There are standard gradings for tread wear, traction and temperature (as well as sustained top speed, load).

AFAIR 100 = (arbitrary?) standard for wear, so grippier tyres will have a lower number, harder wearing ones a higher one. Traction A = good, C = minimum acceptable. Temperature similar. Lud could look at his tyres & say what their ratings are! It would be interesting to know. If I remember, I'll report what's on my old car.
When do tyres lose their edge in the wet? - FotheringtonThomas
If I remember I'll report what's on my old car.


A quick look at my car and a couple of others shows:

Old Accord, Michelin Energy.......... wear=400, tract=A, temp=A
Honda small sporty thing Runways wear=400 tract=A temp=A
Peugot 106 Continental Evo Cont 3 wear=240 tract=A temp=A
Big fat Hyundai Tucson on Soluses. wear=340 tract=AA temp=A

q

Edited by FotheringtonThomas on 12/08/2008 at 19:49

When do tyres lose their edge in the wet? - Old Navy
I knew the "anti cheap tyres brigade" would make a comment on this sooner or
later.
Its all relative. A cheap tyre can be plenty good enough if not driven to
extreme limits etc.>>


Dont you use extreme limits in a emergency stop? I havent needed one for years but I cant predict a child running into the road.
When do tyres lose their edge in the wet? - FotheringtonThomas
In that case, using only the very best tyre that money can buy, with the sole regard of being able to stop as quickly as possible, should be the form. Luckily, in all but an infinitesimally small number of cases, one can indeed predict a child (or anyone else) running into the road, and make allowances.
When do tyres lose their edge in the wet? - Old Navy
I like to think that I can anticipate most things on the road, but an emegency stop is for the exeption when you get caught out. I dont believe anyone is so good a driver that they will never need to stop in a minimum distance.
When do tyres lose their edge in the wet? - yorkiebar
The point I was trying to make ON is that the tyre is the only contact with the road i agree, but it is also dependant upon effective suspension and brakes. View a few mots and I think you will understand a high % of cars are not good in these areas!

Cheap tyres are quite likely as good as any other tyre to stop you quickly when needed, subject to the weather, the tarmac/snow/rain/temperature prevailing.

Ideally you should change your tyre to suit the conditions; but thats not practical so we use a compromise tyre. The choice you make is yours (I am not asking you to buy cheap tyres) but it depends on more than the tyre to stop safely in any condition.

But 1 thing that wont help you stop is a worn out expensive branded tyre! or tyres!
When do tyres lose their edge in the wet? - Old Navy
But 1 thing that wont help you stop is a worn out expensive branded tyre!
or tyres!

Ybar, I agree that tyres are only part of the stopping problem, please see my "missed the edit" entry above.