LOWER pressure will contribute to a rollover! The tire will compress and can pop off the bead in an evasive manuever - think how your front tires squeal and understeer when they are low on air. What was essentially happening with the Explore was they specified a lower pressure for COMFORT and not handling and the tires essentially overheated and blew. Also when a rear tire blows it is far more difficult to recover from than if a front one goes. 29 is the recommended comfort pressure for stock tires ONLY - follow the tire manufacturers ratings and the closer to to max listed on the tire, the better your mileage and typically the tire wear. It is also MUCH safer on long, higher speed travel to be at a higher pressure so the tire does not flex and heat up excessively as the Explorer Firestone's did.