These wheel studs fit most 1998-2012 Polaris Quads and may fit other years and makes as well. They are 1/2" longer than Polaris parts numbers 7515513, 7515523. Replaces Polaris part number 7517871. The studs you are purchasing have a 3/8" x 24 thread and are 1.75" long. The stock studs have 3/8" x 24 threads and are 1.25" long. These studs are 1/2" LONGER. FITS: ATP 330, 350 Hawkeye 300 Outlaw 50, 90, 450, 500, 525 Predator 50, 90, 500 Scrambler 50, 90, 500 Sportsman 90, 300, 335, 400, 450, 500, 600, 700, 800, MV7, X2 500, X2 550, X2 800, XP 550, XP 850 Trail Blazer 250 Trail Boss Xplorer Magnum 325, 500 Xpedition 325, 425 Worker 500