Actually, Twin I Beam makes it LESS likely, not MORE, that the vehicle will roll over. A straight stick axle is far more likely to flip than something with IFS, which is what T-I-B is. It's not a very good IFS, but it still is one.
>>Actually, Twin I Beam makes it LESS likely, not MORE, that the vehicle will roll over.<<
It wasn't my conclusion. It was the conclusion of a study panel that TIB made the vehicle's center of gravity higher and the higher center of gravity was inherited even through to today.
For example;
http://www.rolloverlawyer.com/FordRanger.htm
or just look at the google results.
http://www.google.com/search?hl=en&q=twin+i-beam+rollover&btnG=Google+Search
i've read an extensive report somewhere, just can't find it.