you sure about that? I've never heard anything good about full-flight a-arms. for trails I would go for a-arms with ball joints, heims will wear out with mud and dirt getting into them, with an acception of quicksand a-arms that are made with good quality heim joints but you have to spend a little more $. for good price and quality I would check out sanddragon motorsports recreational a-arms (www.sanddragonmotorsports.com).