Topeak Fuel Tank

The bag is designed with a slim profile to sit securely on the top tube, minimizing the chance of your knees brushing against it while pedaling. However, riders with narrower frames or specific pedaling styles may notice slight contact depending on the bag size chosen.

The Medium size is generally best for smaller items like energy bars and multi-tools, while the Large size provides more length, which is better suited for larger smartphones and longer gear. We recommend checking your phone's dimensions against the bag's length to ensure a proper fit.

The bag uses a versatile nylon strap system that wraps around the top tube and the steerer tube. This allows it to be adjusted and secured to a wide variety of frame shapes and sizes without needing specialized mounts.

The bag is constructed from durable 420 Denier Nylon, which offers good resistance to light rain and road spray. While the zippered compartment keeps your items secure and protected from the elements, it is not fully submersible or waterproof in heavy downpours.

Yes, the strap system is designed to hold the bag firmly in place. When installed correctly and tightened properly against the frame, it remains stable even when riding over bumpy roads or gravel.