Launch and load your boat with confidence using this 5" Center-Guided Boat Trailer Keel Roller. Designed as a direct replacement for worn, cracked, or warped rollers, it restores smooth rolling support and proper hull alignment for safer, easier loading and unloading. Made from heavy-duty marine-grade rubber with a reinforced PVC core, this roller combines strength, flexibility, and long-lasting protection against impact, UV rays, and saltwater corrosion. The center-guided design naturally aligns your boat's keel during loading, keeping it centered on the trailer and preventing side-to-side movement or scraping. This boat trailer roller replacement fits most 5" wide trailer brackets with a 5/8" shaft, making it a universal fit for a wide range of boat trailers. Its non-marking black rubber surface cushions and protects your boat's hull from scratches, dents, or scuffs while allowing smooth, quiet rolling on and off the trailer. Perfect for boat owners, marine trailer repairs, and trailer rebuilds, this keel roller helps extend the life of your trailer and keeps your boat secure during transport. Simple to install—just remove your old roller and slide this new one into place for reliable, steady support every trip.