Ortlieb Quick-Rack Mudguard - 50mm Black. The Quick Rack Mudguard is quick and easy to assemble and extends the functions of your Quick Rack or Quick Rack Light with protection against wheel spray and dirt. The minimalist mudguard is not only a perfect stylistic match for the Quick Rack and Quick Rack Light but also adds functionality by protecting your bike your bags and you from wheel spray and dirt. This makes sure you can ride in adverse weather conditions as well so that your bike becomes even more flexible. Three versions ensure an ideal fit for different tire widths.