Funny since the Car and Driver test found that the Explorer handled every single tire-blowing test with no problems. They couldn't roll it over, and they tried.
I saw their little test and I was not impressed. They rigged an Explorer so that a REAR tire would deflate nicely while driving STRAIGHT ahead. They defended their testing method by saying that it was the rear tires that had tread seperation on MOST Exploreres that rolled. They might have a point, but I'd like to see what happened when a FRONT tire deflated.
Also, a tread seperation is much different than having a tire deflate in a nice controlled test.
Let's say a rear tire had a tread seperation while driving down the freeway, which is what Car and Driver said was the most common situation.
The tread could fly around in a unpredictable manner and become temporarily jammed in the wheel well, causing the back of the vehicle to slide. Maybe this reason is why drivers over reacted and jerked the wheel, causing the rollovers.
I belive my theory can be backed up by a real world rollover case. See bold text below.
http://www.time.com/time/business/article/0,8599,128198,00.html
....Engineers were concerned from the get-go about the Explorer's stability during emergency handling procedures. After a test-track trial in April 1989?one year before the Explorer reached showrooms billed as a rugged and reliable family vehicle?a report noted that the SUV prototype "demonstrated a rollover response ... with a number of tire, tire-pressure [and] suspension configurations." Another report noted that the Explorer's "relatively high engine position ... prevents further significant improvement in the Stability Index [a measure of resistance to tipping] without extensive suspension, frame and sheet-metal revisions," which the company rejected.
.....While undergoing handling maneuvers in 1989, an Explorer prototype showed a greater tendency to lift its wheels while turning?a possible prelude to rollovers?than even the Bronco II. The test report observed that the Explorer had to be "at least equivalent to the Bronco II in these maneuvers to be considered acceptable for production."
That was a rock-bottom standard, since the image of the Bronco II continued to worsen. In June 1989 a Consumer Reports article titled "How Safe Is the Bronco II?" rated its handling as poor in a test that simulated rapid lane changes. The Consumers Union publication advised "prudent buyers" to steer clear of it. According to an original analysis prepared for TIME by University of Michigan statistician Hans Joksch, an expert in automotive statistics, the Explorer has had approximately the same rate of fatal rollovers as the Bronco II.
With the Explorer's 1990 production date approaching, Ford engineers listed four options for improving the stability of the SUV: widening the chassis by 2 in.; lowering the engine; or lowering the tire pressure and stiffening the springs. Ford chose the latter two fixes and recommended a tire pressure of 26 p.s.i.?rather than the 30-to-35 p.s.i. that Firestone normally used in its tires?to produce a more road-gripping ride. This created friction between Ford and Firestone after last year's recall, with Firestone insisting that the low pressure had increased the heat on the tires and caused the tread separations.
Ford engineers could hardly wait to replace the Explorer's outmoded front suspension. In another 1989 memo, engineer Charles White noted the start of discussions "to revise the Ranger and [Explorer] suspension due to out-of-date performance of the Twin I-Beam." White added that although Ford had planned to replace the Twin I-Beam in 1998, "it was agreed that we would look at earlier incorporation of a new front suspension out-of-cycle for the reasons stated above, not safety."
Replied engineer David Houston: "In the event you take a poll, my vote would be to change the cycle plan to replace the current front suspension at the earliest possible opportunity. I believe that this would positively position the [Explorer] to be immune from criticism arising from allegations regarding limit handling maneuvers"?an apparent reference to the SUV's test-track performance.
Ford's decision to increase the stability of the Explorer by lowering the tire pressure soon had unintended consequences. The mushier tires held the road better but worsened fuel economy. When Ford asked Firestone to fix the problem, Firestone reduced the weight of the tire about 3%.
By 1995, Ford had finally replaced the Explorer's unloved Twin I-Beam with a short-and-long-arm suspension but didn't act on previous recommendations to lower the engine and widen the chassis. And since the new suspension weighed less than the Twin I-Beam, the change raised?not lowered?the SUV's center of gravity.
A warning light flashed in August 1996 when, documents show, a trainee test driver in Oscoda, Mich., lost control of an Explorer while conducting lane-change maneuvers at 52.5 m.p.h. According to the accident report, the driver overcorrected for a rear-end slide, sending the vehicle first into a four-wheel slide and then a 360[degree] flip.