One common error among ATVers is choosing a bad which looks great but doesn't fit on their quad. Next thing you know, their new product is causing more harm than good by partially blocking their headlights. This obstruction could be fatal when driving on dark nights! Most reliable ATV rear seat bags will have the measurements for the bag's overall dimensions online prior to purchase. We recommend measuring the back of your ATV – and the prospective length, width, and height of your soon-to-be bag – to ensure that you'll know your desired product will be able to fit easily on the back.