What Our Gearhead® Experts Are Saying:"I added the Downtube Bag to my setup when I needed extra space for tools and spares, and now I don’t ride without it. It stays solid over rough terrain and doesn’t rattle, even when loaded. The roll-top closure keeps out all the trail grime, and I love that I can move it from bike to bike without any hardware."Every bit of space matters when we’re packing for longer rides or streamlined bikepacking setups, and the Restrap Downtube Bag helps us make the most of it. Perfect for smaller frames or bikes with limited clearance, this low-profile bag fits cleanly beneath the downtube, adding 1. 2 liters of waterproof storage where it counts. Handmade in the UK with rugged materials, the bag uses a single hook-and-loop strap and integrated anti-slip pad to stay firmly in place, even when bouncing down rough gravel or navigating tight singletrack. We stash heavier items like tubes, tools, and CO2 canisters inside to keep weight low and balanced—especially handy if we’re running a dropper post or skipping a saddle bag altogether.