Muc-Off Big Bore Tubeless Valves

Unlike traditional Presta valves that rely on a small, removable core, the Big Bore Lite uses an internal ball valve mechanism. This design removes the restriction of the valve core entirely, allowing for significantly higher airflow when seating your tires.

The coreless design is specifically engineered to prevent the sealant build-up that typically clogs standard valves. Because there is no narrow core for the sealant to dry inside, you will experience fewer maintenance headaches and more consistent airflow.

These are designed for standard tubeless-ready rims that accept Presta valves. However, because the stem length is 70mm, you should ensure this length is appropriate for your specific rim depth to ensure a proper fit and easy access to the lever.

Each valve features a 4mm machined hex key slot at the base. This allows you to tighten the valve securely into your rim using a standard hex key, which is much safer and more precise than using pliers that could scratch the aluminum finish.

Yes, the integrated external lever makes on-the-fly pressure adjustments straightforward. You simply flip the lever to open or close the ball valve, which is often faster and easier than fumbling with a traditional threaded valve nut.