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Hi Eric,
I’m a very big fan of you and love what you do, but man you got out of hand in this one.
I worked for several years in car industry and mostly performance department. The test you have done is “rigged” from the start. It’s not a way of testing new tires at the front or at the back in this way. The test you made was sure to give a 100% chance to new front tires but… Let me explain:
In snow condiditions you are expected to have 4 good tires. Obviously, if you go on a parking lot with very tight turn radius the front will slip with less then new tires. It’s basic. But unless one only drives in that conditions, new tires always go to the back. (Every car manufacturer says that, every tire manufacturer says that, every safety agencie says that, and all of we who worked on performance say that).
I’ll explain why:
Most of the weight of the car is (generealy) at the front, so in almost every situation the weight will be pushing hard on those tires against the ground. If you are cornering at speed, the front always will have more weight on it, while the rear is the exact oposite. At the fron, the mass of the car is pushing hard on those tires, at the back the tires have to do extra work to grip and hold the rear end.
Braking is exactl the same situation, if you brake with new tires at the front, and old at the back, specially in even a slight corner, you can have a very bad surprise.
Common “myth” is that since it’s the weels at the front that do the steering you should have the good tires there. Not exactly because that can actually unbalance the car, since the rear end will have no traction and you loose the rear. If the good ones are at the back, the front can slip for example but the rear will remain glued to the ground, so in the second the front grips again the “whip effect” woun’t throw the rear to the embankment.
Very good video explainig these:
[video]https://www.youtube.com/watch?v=__0DL8dE3Eo[/video]Sorry for the long text, and it’s actually my first in here, and sorry if my English is not the best, but I’m Portuguese.
Best regards and keep it up Eric, you’re awsome!