Ortlieb Toptube Frame Bag

The bag features a slim, tapered profile specifically designed to stay within the width of your bike frame. Most riders find it causes zero interference, though your experience may vary slightly depending on your bike's geometry and pedaling style.

No, the bag uses a secure strap-based mounting system that attaches directly to your top tube. This makes it compatible with almost any bicycle frame, regardless of whether you have existing mounting bolts.

It is fully waterproof. Ortlieb uses durable, welded materials and a high-quality closure system to ensure your electronics and gear stay completely dry, even during heavy rain or muddy rides.

Three liters is quite spacious for a top tube bag. It is perfectly sized for a multi-tool, a spare tube, a smartphone, a portable power bank, and a handful of energy bars or gels.

The mounting system is designed for stability, but proper installation is key. As long as you pull the straps tight against the frame, the bag remains stable and secure, even when you are climbing or sprinting.