SKS B55 Bluemels Full Coverage Fender Set - 55mm 700 x 38-47 BlackSKS B55 Bluemels Full Coverage Fender Set 55mm 700 x 38 47 Black. The Bluemels fenders offer SKS classic full fender protection in a curved fender profile design. The fenders are created using ultra fine strips of aluminum embedded into a plastic coating. This means the fenders are lightweight and extremely durable. The fenders come with a break away safety system which allows the fender stays to break away if a branch or piece of debris gets caught