Planet Bike Grunge Board

The Grunge Board is designed to be universal. Because it uses a flexible two-point rubber strapping system, it can attach to almost any downtube shape, whether your frame is round, oval, or square.

Not exactly. As a downtube-mounted fender, its primary job is to block debris and spray from hitting your chest and lower face. It will not provide the same level of coverage as a full-length wheel fender, but it is excellent for keeping the worst of the trail grime off your core.

No tools are required. The fender uses a simple, two-point rubber strapping mechanism that you can tighten by hand in just a few seconds.

It is suitable for both. The minimalist, durable design is specifically intended to handle trail debris and mud, making it a great lightweight option for mountain bikers who want to avoid a full-coverage fender setup.

The rubber straps are designed to be gentle on frames. However, if you are concerned about long-term wear or have a particularly delicate finish, you can easily place a small piece of clear protective tape or a thin rubber shim between the strap and the frame.