These mudguards will fit over both drum and disc brakes. The system attaches to the mirror/fender mounts and bolts on using 'bar end' style mounts. These 20" fenders work on the Magnum SD, Magnum XL, Magnum BW, GT20, GT26 and older GTR, GTO, GTT2S and GTT5S trikes and tandem trikes. We supply as much installation information that we can when you purchase fenders from us. You will receive either the manufacturers installation guide or our generic fender installation guide.Fenders can be tricky to install and may require some level of customization depending on the brand. While some fenders come with instructions from the factory, it may be difficult for a layperson to install if they don't have the mechanical know-how or tools. Download a PDF file of our generic fender instructions to get a better idea of what it may entail. Or, watch our YouTube video on how to install a rear fender on an HP Velotechnik trike. You may want to visit the Hostel Shoppe to have the fenders installed (installation is half-price when you buy the fenders from us) or take them to your local bike shop for installation. Product Notes: Two Fender/Mirror Mounts (for Magnum & GT II Series) or two Fender/Mirror Mounts (for GT20 & GT26) are needed (one for each side).
