UTV X4S Track System - Polaris Versatile UTV track system, For small to mid-size side-by-side vehicles with 3 seats or less, Double bearing hubs and oil bath housing for optimum durability, Bolted idler and midroller wheels feature interchangeable double bearings for increased durability and easier maintenance, Front-mounted tracks with flexible sides and slight curve toward the inside for a stable handling and a more comfortable ride than traditional tracks