The THRASHIN SUPPLY CO. Reservoir Cap is engineered for rear brake systems on street‑style motorcycles. Constructed from 6061‑Aluminum, the cap delivers a lightweight yet durable solution that resists corrosion and maintains structural integrity under high‑temperature conditions. Its black finish provides a clean, low‑profile appearance that blends seamlessly with the rear brake assembly. Designed for a single unit installation, the cap is specifically tailored to the M8 mounting standard found on Softail models, ensuring a precise fit and straightforward installation.
Available in two finish options—black twice‑cut and chrome—the cap offers versatility for riders who prioritize either a subtle, matte look or a more reflective, high‑contrast aesthetic. Both configurations maintain the same core specifications: 6061‑Aluminum construction, rear mounting position, and compatibility with street‑style braking systems. This component is a reliable choice for riders seeking a high‑performance, OEM‑grade replacement that preserves the integrity and look of their motorcycle’s braking system.