Designed as original equipment for select polaris ranger models, the mu511/mu521 are ready to work.Featuring a generous contact patch and a robust, 6 ply-rated carcass, the mu511 front and the even wider mu521 rear ensure that you can haul heavy loads with ease.With a tread pattern similar to the ceros, the mu511/mu521 also offers excellent traction and tread wear.Tall blocks and large void areas clear mud easily, so rainy, muddy weather is no problem for the mu511/mu521.