I have a 2010 Edge with factory side rails. I was agonizing over what I should do to complete my rack system (remove side rails and install a complete aftermarket system, purchase factory cross bars, or purchase aftermarket towers and cross bars). I was familiar with the complete Yakima system and felt comfortable with its reliability. I purchased the Yakima Railgrab towers and 58" cross bars. Before installing the towers and crossbars, the siderails almost seemed too loose....not anymore. The rack is solid. I can grab the cross bar and shake the whole car. I'm very happy with it. Hope this helps.