The Almsthre Signature Frame Bag uses a three-compartment design that keeps tools separated from food and electronics. The rear compartment functions as a garage section for tubes, tire levers, CO2 cartridges, and multi-tools, which prevents grease or dirt from contaminating snacks or gear stored in the front compartments. This separation means you can grab energy bars without digging past chain lube or patch kits. The bag mounts to your frame using trim-to-length velcro straps that wrap around the top tube, down tube, and seat tube, with loop webbing running the length of the bag to provide multiple attachment points for different frame geometries.

The ripstop nylon construction resists tears from frame contact or sharp tool edges, and waterproof zippers seal each compartment against rain and road spray. The front-left compartment opens toward the rider for easy access to nutrition or a phone while riding. The front-right compartment provides a shallow pocket sized for electronics or wallet items that you want to keep flat and protected. The rear garage compartment includes a credit card pocket and enough volume to hold two tubes, a pump, tire levers, and a comprehensive multi-tool without bulging or creating pressure points against the frame.

The bag ships in two sizes to match different frame dimensions. The small-medium size measures sixteen and a half inches long by two inches wide by three inches tall, providing 1.6 liters of capacity and fitting frames sized 50 centimeters and up. The large-extra large size measures nineteen inches long by two inches wide by four inches tall, providing 2.3 liters of capacity and fitting frames sized 56 centimeters and up. Both sizes include three removable velcro straps that you trim to length for a custom fit on your specific frame.