DURABLE FOR MILES OF USE - The Sonar Zen roller skate wheels' durable urethane will give you long-lasting grip whether on a rink floor, sidewalk, or street. ENGINEERED TO AN IDEAL RIDE - These outdoor recreation skate wheels reduce friction and maximize speed on various types of surfaces. These quad rollerskate wheels are great for casual outdoor skating. SMOOTH RIDE FOR COMFORTABLE SKATING - These versatile skating wheels roll smoothly to help improve the comfort of your ride. The Sonar Zen wheels from Riedell can upgrade your skates or be future replacements. INCREDIBLY RESPONSIVE TO YOU - The Sonar Zen skate wheel design makes it easier to perform stops, and it offers excellent handling for trail skating. MATCH YOUR SKATES - These wheels come with an 85A hardness. The Sonar Zen comes in eight different colors to match any set of skates. This is not a children's product and is not designed or intended for use by children 12 years of age or younger. Sonar Zen Skate Wheels (4-Pack)Whether you are a casual skater or an outdoor enthusiast, these skate wheels are a great fit for you. The Sonar Zen features a 85A hardness urethane formula created to give skaters good roll at an affordable price. These 32mm x 62mm wheels are available in 8 great colors; black, blue, pink, red, green, orange, yellow, and magenta. The Sonar Zen is the perfect recreation skating and outdoor trail skating wheel to fit your lifestyle. The Sonar Zen is the perfect skate wheel for anyone who wants a quality wheel at a reasonable price. Sold in packs of four wheels. To order a full set of wheels, be sure to set your quantity to two. About RiedellPaul Riedell and his wife Sophie founded Riedell Shoes Inc. in Red Wing, Minnesota more than 70 years ago with one goal in mind – to produce and offer only the finest quality skates available in the market. Paul desired to make skating available to people of all ages and abilities by creating comfortable and affordable skates that still incorporated the same attention to detail and quality found in every Riedell product. As time has gone by, Riedell Shoes has continued to re-invent its product lines and hire only the most skilled and professional employees in the hope of achieving the very same perfection that inspired Paul. Through extensive knowledge of skate fitting and advanced comfort and performance technologies, Riedell Skates has assembled the most complete and sophisticated line of roller and figure skates in the industry. Whether you are interested in a comfortable skate that accentuates your style, or you are looking to gain a competitive edge, Riedell has the skate for you.