Filed under: Truck , Safety , Chevrolet , Dodge , Ford , GMC , Nissan , Toyota IIHS Full-Size Pickup Rollover Crash Testing – Click above for high-res image gallery Like their body-on-frame SUV cousins, full-size pickup trucks are more prone to roll over than a standard passenger car. That’s exactly why it’s so important to have a vehicle that earns good marks in roof-strength tests. The Insurance Institute for Highway Safety has just released the data on its recent volley of tests on full-size pickup trucks, and both the 2011 Ford F-150 and 2011 Toyota Tundra earned the coveted Top Safety Pick designation. The vehicles earned the highest possible rating of ‘good’ in the institutes crush test, where a large steel plate is pressed against one corner of the roof to calculate a strength-to-weight ratio. Meanwhile, the 2011 Nissan Titan took home an acceptable rating in the rollover evaluation while the 2011 Chevrolet Silverado , 2011 GMC Sierra and 2011 Ram 1500 netted marginal scores. IIHS says that the roof on the Toyota Tundra stood up to 4.5 times the truck’s weight while the F-150 handled 4.7 times the pressure. A vehicle must withstand 4 times its weight before five-inches of crush is detected before being awarded a Good rating. Hit the jump for the full press release. Continue reading Ford F-150, Toyota Tundra earn IIHS Top Safety Pick Awards Ford F-150, Toyota Tundra earn IIHS Top Safety Pick Awards originally appeared on Autoblog on Thu, 12 May 2011 18:20:00 EST. Please see our terms for use of feeds .