Hold Fast Half Frame Bag
The Hold Fast Half Frame bag will add functional capacity to your setup, whether it’s for your daily commute or an overnight adventure! Find our sizing guide under the SPECs Tab to ensure the best possible fit with your frame.
The Hold Fast Half Frame Bag is made out of Challenge ECOPAK 100% recycled polyester and contains roughly 5-7 plastic bottles rescued from ocean beaches.
Finally! A practical home for awkwardly shaped essentials like your pump, your tent poles, or your hydration bladder. Hydration hose outlet along the top perimeter of the bag. On the underside of the bag there is an external daisy chain that runs the length of the bag to allow of the lash-on of additional items like a pump, tent poles etc.
Looking for solutions to running a half frame bag and maintaining water bottle clearance? Check out this incredibly useful mounting base from Wolf Tooth.
Find our sizing guide under the SPECs Tab to ensure the best possible fit with your frame.
Challenge Sailcloth ECOPAK (EPLX400) shell fabric
Challenge Sailcloth recycled polyester bag cloth rip stop (450D)
Large, main pocket and small, external organizer pocket
YKK water resist zippers
.125″ closed cell foam for padding at top tube and downtube
Nylon mesh stabilizer along top tub to add rigidity and support.
One-wrap velcro attachment straps with flexible mounting points for top tube
Hydration hose/cable port on top panel of bag
Made in Seattle, WA.
- 2.8 L: 17.5” X 4” X 2.25”
- 3.5 L: 19.5” X 4.5” X 2.25”
- 4 L: 21” X 5.25” X 2.25”
- Capacity: 2.75 Liters, 3.25 Liters, 4 Liters
- Weight: 5.75 oz, 6.5 oz, 7 oz
Unsure about the right size Hold Fast Half Frame Bag for your bike? Print out templates of the bags to test sizing at home:
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Excellent frame bag!
I used to have a cheap 2-liter bag from Amazon. The medium Swift frame bag was quite a bit more expensive but totally worth it. The extra half-liter really does help with storing more items and I can keep a small Allen multitool in the side pocket, so for small adjustments I don't have to take off and open my seat bag to get more comprehensive tools. I do have bottle mounts under my Lynskey GR300 top tube so I cut off the straps and fashioned an aluminum L-shaped strip to bolt the bag directly to the frame. The molle mounts on the bottom are awesome for attaching a small knife - no other bike bag makers are using the molle system and they should because it's perfect for attaching additional things. I've ridden in the rain a few times and while the bag isn't totally waterproof, it does keep your stuff from getting soaked. The main compartment zipper runs nearly the entire length of the bag, making it easy to get things in an out. I can still mount a 500 ml water bottle under the bag, since it has such a slim profile. This bag is extremely durable and very thoughtfully designed.
Purchased the size medium for my Norco Search XR S2 and the fit is nearly perfect. Printing out Swift’s templates made it easy to visualize. I almost ordered a small as it was obvious the medium would be a snug fit & I was worried about excess material being sloppy. I needn’t have worried. The bag tucks in nicely to the frame & while the attachment straps were long (no doubt to accommodate attachment to various frame types), they were easily cut down. I’m very happy with the fit. As far as riding with the bag, so far so good. The attachment straps are very secure and I’ve noticed zero rattling or movement of the bag. I’m using this bike as my everyday, do everything ride & this bag is a perfect accessory. So far, I’m riding with a cable lock, packable jacket, mini pump, spare tube, a hat, & a few snacks/bars in the main compartment. The left side is great for a wallet or regular size iPhone. Looks like it might be a tighter fit for some of the larger phones in that pocket…YMMV. I’m not used to riding with any kind of load on my bike & while the weight is noticeable, having all of it contained in the frame means there are pretty much zero changes to how the bike handles. There is plenty of clearance for my legs as I pedal. In short, the bag is basically invisible while riding. Negatives? Well, I’ve had to pare down to one bottle cage, but that’s more a function of my frame size vs any issue with the bag itself. Looking at Swift’s templates, the smaller bag might’ve allowed me to retain two cages, but it would’ve been tight. These guys are smart though & knowing this may be an issue, they’ve provided a port for a hydration tube. Stuffing a small bladder in the front of the bag wouldn’t take away much of its capacity. The only other ****** I can come up with is that they didn’t have the color in stock that I really wanted, but hey….early bird gets the worm I guess. Overall, very happy with the bag & happy to support a local business at the same time. Great job Swift!
Nice but too long for the frame
The bag is nice, especially at 50% off. However the bag is quite long even on my 54cm frame. It kind of droops out sideways because it's too long underneath the toptube.
Hi James: If we can help you exchange your 3.25L holdfast for the smaller size we would be very happy to do so! Just reach out to customer service and they can walk you through the returns and exchange process. https://builtbyswift.com/contact-us/