An insurance group says low-speed crashes result in expensive repairs simply because of differences in bumper height between cars and SUV's. The Insurance Institute for Highway Safety tested five pairs of 2004 and 2005 vehicles from major car companies -- putting each through ten mile-an-hour crash tests against each other. They found cars from Ford had the lowest repair costs. Cars made by Volvo and Daimler-Chrysler AG had the highest repair costs. The group says it was surprising to see how much damage a car could do to an SUV. There are no set standards for bumpers on SUVs, trucks and other such vehicles -- which leads the insurance group to say those vehicles often have flimsy bumpers or none at all.