For ultimate peace of mind on the road, replace your idler hub with Lippert. This idler hub fits a 3,500-lb. axle. It's made from solid, durable iron and has a 5 on 4.5" bolt pattern with a 1/2" stud. All our idler hubs come with a limited one-year warranty. Please consult your original equipment before purchasing. Be sure to inspect and maintain your equipment periodically for optimal performance.