Originally Posted By: Gary Allan
Originally Posted By: Spyder7
One real world test of mixing tire types:
"Don't I just need snow tires on the drive wheels for traction?
This myth was laid to rest when we went out on the dry test track and drove a pair of BMW 330Ci coupes, one with a full set of snow tires (Michelin Artic-Alpins) and the other with those snows on the back (the 330Ci is rear-drive) and high-performance rubber in front (Michelin Pilot XGT H4s).
This was definitely an eye-opener. Before we ran each car, we shut off the stability control system and were warned that one of the cars might end up biting us (car-guy talk for a car sliding out of control). Taking the 330 with the four snows through the course, the car felt solid and predictable. Running the 330 with the Pilots in front and Alpins in the back, the tail wagged increasingly as we zigzagged through the cones and then the car spun 180 degrees. Whoa! We drove home the point of the test with an exclamation point made in rubber marks on the track.
Mismatched tires can (and will, if pushed) adversely affect a car's handling; with the ends of the car having differing levels of grip, it is more apt to slide the tail or even spin out. Had we been driving in the snow, the rear tires probably would've had no problem propelling the car but steering and braking wouldn't fare as well — the high-performance Pilots would've washed out as the snow would easily pack their small grooves, essentially turning them into slicks. Not good on snow, slush or ice."
from:
http://www.edmunds.com/ownership/safety/articles/100811/article.html
-Spyder
These are two Euro artsy fartsy high end paycheck nobles talking ideals there. No one I have EVER KNOWN have put snows on all 4 corners on RWD. I have SEEN people recommend it.
Go tell the average 2wd pickup truck owner to put HIGH DRAG snow tires on non-drive wheels. It's not going to happen.
I'm going to apologies ahead of time. Some people are nature's way of saying that they make too much money.
When I ran snows (they were "the hot lick" hydrophyle tires at the time) my Rabbit came with 155r13 ..I upgraded the rims and tires to 175/70r13 ..WAY bigger foot print and WAY LOWER ground pressure. Floating was the norm.
I managed 70mph on glare ice on the NJ TP while there were hundreds of drivers doing 35mph all honking their horns and flashing their lights. Could I stop? Not a chance. I wouldn't have done much better with 4 snows ..and since most of you are too young, FWD was relatively NEW to mainstream America and studded tires were moving out of vogue. None of the Euro-tyres were pinned for studding.
There was a time between stone knives and bear skins and our current schools of thought. Most of those schools of thought are geared toward the lowest common denominator. Technology compensating for lack of knowledge.
Well at least in Quebec it is the law. They have to be on the car before Dec 15 and cannot come off till March 15. Anything to help a car stop shorter in ice and snow is a definate bonus. It has been proven that snow tires on all 4 corners are better than 2 snows and alot better than all seasons.