Topeak MTX TrunkBag EXP

Yes, it is designed exclusively for Topeak's MTX QuickTrack racks. It will not securely attach to standard racks without the proprietary mounting rail system.

The side panels are folded and zipped into the main body when not in use. When you need extra capacity, simply unzip them to deploy two side-hanging panniers that provide significant additional storage space.

It is made from water-repellent materials, which are sufficient for light rain or road spray. However, it is not fully waterproof, so you should use a rain cover or dry bags for your electronics if you are riding in heavy downpours.

Yes, it includes a detachable shoulder strap, making it easy to carry into an office or store. While it is structured and rigid, the strap makes it convenient for short walks.

Because it mounts to the rear rack, it sits behind your seat and should not interfere with your legs while pedaling. If you are using the expanded panniers, ensure they are loaded evenly to maintain bike balance.

The bag offers a total capacity of 16.6 liters. This includes the main compartment and the expandable side panniers when fully deployed.