There's an assumption here that brand new tyres grip better than scrubbed-in tyres, which is wrong. Given that a tyre has enough tread left to drain properly in the wet - which it always must have - and that wear across the tread is more or less even, it will give best grip the less tread it has - that's just described the tyre off the back of a front-wheel drive vehicle. Put new ones on the back to scrub them in - and to conform to the law in some countries - then put them on the front to prevent the rubber becoming too old.
So; put the new ones on the rear, then when the releasing agent has been worn off and the tyres scrubbed in, put them on the front? I don't have any axle stands or a trolley jack so I'd have to pay someone to do it.
New tyres go on the back. End of.
Testicles.
Absolutely.
Why is it rubbish? Got any proof to justify that claim?
I still go with the view new on rear, and have always done this.
Yeah me. 35 years and (approx) 1,250,000 miles.
Yeah, how exactly is it rubbish?
Are you saying she's faking losing control with older tyres on the rear?
Why would she do this?
You've obviously never seen "Unsafe at any speed" This was the book and film that made Ralph Nader's name for him.
Some interesting opinions on this one. I'm a college Lecturer in Motor Vehicle Studies and not many people consider me a 'retard'. It is generally considered within the industry that understeer is safer than oversteer. Most of the time extreme manouvering usually takes place under braking. Weight transfer forward on a car that understeers starts to bring the steering characteristics to a more neutral feel. Therefore with new tyres tending to have a greater slip angle than worn ones they will produce understeer on the front and oversteer on the rear. Also new tyres when produced have an oily/waxy coating on them that is a releasing agent to allow them to seperate from their moulds. This in damp conditions is extremely slippy. I once had a new tyre fitted to the rear of one of my cars and it rained later. As I travelled around a traffic island the back of the car started to drift with considerable ease. In my opinion, if you want safe, on the front. If you want exciting, put them on the back but don't say you weren't warned!
Somebody with a degree of authority.
She was clearly exaggerating the "problem" to fit the message the powers that be above her want to project. You could see how bored she looked, especially as she had to "lose control". I'd rather a nosy car thanks.
Here we have the anatomy of an oversteering front wheel drive car:
1) Enter bend too fast. Any vehicle that skids has too much momentum for the level of available grip.
2) Because the natural tendancy of a FWD car is to understeer, in an ideal world, the driver will realise this and start to take action there and then, as stated by Ms. Butler-Henderson and the woman in the US video.
3) The fact remains that the vast majority of drivers in this country, are too pre-occupied, distracted or simply insensitive/incompetent to detect when this is starting to happen, that by the time they do, the vehicle is close, if not at, terminal understeer.
4) By now the driver is trying to remember exactly what it is he is supposed to be doing at this point. Remember FWD cars are usually more nose heavy than RWD vehicles. The extra weight is pushing the nose still further into the front wheel skid. At this point, the driver does not make the calculated minor adjustment to the steering that would help cure the problem, (a) because it's
already gone too far and (b) because he is now panicking. Instead, he yanks the wheel over in the opposite direction (for argument's sake, let's say the car is in a left hand bend and is sliding to the right) so he pulls the wheel further to the left, which loads up the off-side front tyre which should increase grip. Alas, the tyre is no longer at an angle to the direction of travel whereby it will do any good. The flip-side of that is the near-side rear tyre is unloaded, therefore has less grip. He then takes his foot off the gas which further transfers weight to the front, loading up the off-side front and unloading the near-side rear even more and reducing the level of grip again. His next move is to brake. The above effects are exagerated yet further and it's now a case of "Goodnight Vienna", there'll be a Policeman along to take your statement in a minute sir.
5) There is a possibility, in a FWD car, that once our hero had used the steering to try and correct the skid, he could have used the throttle to keep the front end ahead of the back. In a RWD car he would have had to. Keeping some throttle on in a RWD vehicle would have the effect of counteracting the polar momentum which is when the back tries to pass the front, but this time in the opposite direction.
There is a bend on a slip road where the A538 joins the M56 towards Manchester, it's at J6, if anyone wants to have a go. It is at least as sharp as the one shown in the You Tube vid. I routinely take my Panda MJ and Mrs. Beard's Stilo 1.4 Active round that bend in the wet at 40. The Panda has tyres with less than 2,000 miles on all 4. The Stilo has tyres with 1,000 mile on the front and the original 4 year old 30,000 mile rubber on the back. Guess what? Neither cars oversteer. They both slip at the front first.
Doesn't mean I'm right of course, but having been on attachment to an accident investigation branch and undergone several courses myself, not to mention driven Oulton Park numerous times, I might, just, maybe, possibly have a valid viewpoint on this.