Wunderlich - Mudsling Inner FenderMudSling Inner Fender R 1300 GS Adventure Function and Product Features The MudSling inner fender provides 220% more surface area than the standard fender It is 185% wider as it extends around the sides to reduce spray toward the front The MudSling is injection moulded from durable 3 mm thick polypropylene with a fine texture that matches other plastic surfaces on the GS Precisely shaped to fit under the existing fender and closely align with the