The placement of the rear brake master cylinder on most motorcycles leaves it exposed to rocks and other trail debris. The BMW R1300GS is no exception -- protect yours with a rear brake master cylinder guard from AltRider. Laser cut 1/8 inch (3.2 mm) aluminum fully protects the vulnerable rear brake master cylinder from damage. The easy-to-install guard installs in minutes using OEM bolt holes and provided flush mount hardware. Designed to match the sleek lines of the R1300GS the guard is available in anodized silver or black. Protects rear brake master cylinder 1/8 inch (3.2 mm) aluminum is strong yet lightweight Simple installation with provided flush mount hardware Available in anodized silver or black finish Compatible with BMW R1300GS