Middle of Bike: Frame Bags

The frame bag makes up the heart of a bikepacking system. Keeping weight centered and low on a frame, frame bags take advantage of the underused space within the frame's front triangle. Your bike handles better, and you're better equipped to  go the distance. 

We offer full custom frame bags for riders looking for a bag that fills their entire front triangle, or partial frame bags for riders who just want to take advantage of easily-accessible storage space while still using their water bottles.

We build our frame bags with Dimension Polyant VX21 sailcloth sides and use high quality 1000D Cordura for high contact areas against the frame. Both of these materials offer high degrees of waterproofing and great strength at low weights.
  1. White XPac VX21 Frame Bag
    Out of stock

    Custom Frame Bag

    Out of stock

    Looking to get started with a new frame bag? You're in the right place. With strong X-Pac VX21 and Cordura fabrics, beefy YKK water-repellent zippers, and hypalon-reinforced attachments, these frame bags are in it for the long haul with you.

    Our custom frame bags are built to the specifications of your frame. We'll need measurements of your specific bicycle—see details here—and then we'll put together a bag to match. We build our frame bags to be 65mm wide throughout, tapering in a bit at the bottom bracket to avoid tearing from the chain. 

    You have a few options to think on as you're planning your frame bag. These range from additional zips (ideal for larger frames) to flared out fronts of the frame bags (ideal for those looking to maximize storage space). 
    Colors:  Black / White / Red / Grey

    All of our frame bags start out with a single #10 YKK Urethane-coated water repellent zipper; a beast of zipper, settle for less at your peril. If you're riding a particularly large bike--generally appropriate with a top tube length > 520mm--we'd recommend going for an additional zippered compartment towards the base of the frame bag to keep your gear a little more organized. Velcro flaps keep this compartment separate from the main storage space, and can be folded down when the second compartment isn't wanted. Further zipper options include making a map pocket on the non-driveside of the frame bag.

    We use the slightly smaller #8 zips for additional zippers, as these compartments generally won't see as much abuse as the main zip.

    Zippers are a great, convenient way to open a frame bag, but even the best of them need to be taken care of. After muddy or dusty rides, wipe down the zipper with a wet cloth to prolong its lifespan.

    Flared fronts:
    For riders looking to maximize their storage space, choose this option. We'll modify the front of your frame bag to widen from a width of 65mm to 120mm at the head tube. We'd say this is a bit unnecessary on road bike frames-- road bike geometries tend to be more spacious than their mountain bike compadres. But on a semi-fat or full fat bike? Fatten it up! 
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  2. White VX21 Partial Frame Bag
    Out of stock

    Partial Frame Bag

    Out of stock

    Our 1/2 sized frame bags are ideal for road cyclists, mountain bikers riding large frames, or for those who simply want to take advantage of more gear space while still using water bottles. Maybe you're a commuter looking for a more stream-lined way to carry a change of clothes? 1/2 frame bags could be your friend.

    Our 1/2 frame bags are available in 3 different stock sizes. Based on a rigorous analysis of bike frames and geometries, we came up with 3 different geometries that conform well to a wide range of different bikes. All of the bags use cam-lock straps around the seat tube, head tube, and down tube to ensure a sturdy fit on different size bikes.
    Alpamayo Designs Half Frame Bag Sizing Analysis

    These 1/2 frame bags are constructed to the same high quality and water-resistant standards as our full-size frame bags, with VX21 & 1000D Cordura sides and a #8 YKK Urethane coated, water repellent zipper.

    1/2 Frame Bag Size Details:

    Inside top tube lengths:

    Size #1: 480mm
    Size #2: 495mm
    Size #3: 535mm

    Size #1 corresponds to a small to medium mountain or road bike, Size #2 to a medium to large mountain bike, or a medium to large road bike. Size #3 will generally only fit well on very large road bikes, but check the length of your bike's top tube to compare.

    For proper fit, choose the size closest to, but not longer than, your bike's inside top tube length. So say your bike has an inside top tube length of 470mm - you'd want Size #1. Or if your bike's inside top tube length is 486mm - well, you'd still be best going for a Size #1, and the adjustable straps will take up the slack. But for an inside top tube length of 525mm, you'd be best suited with a Size #2, instead of getting the closer fitting Size #3 that will need to be squished in to fit.

    As always, send us a message if you have any questions.

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