Apidura makes a lot of nice stuff, I have their racing handlebar bag and love it! This frame bag has the same excellent quality of craftsmanship with just one serious design flaw! The zipper flap! The bag already has welded waterproof zippers, the flap is redundant! The issue is that the flaps tend to fold out, like the edge of a wing, and your inner thigh catches that edge on every pedal stroke! NOPE! Instant deal breaker!
I suppose that if you kept the bag tightly packed, and only fit it into a frame that is an inch or so longer than the bag it might stay pulled tight enough to keep the flaps tucked in. I used Apidura's frame bag sizing tool on their website and purchased exactly the size that was recommended for my bike. Maybe size down if you want to try it.
I did find a frame bag that worked well, so I don't think I'm being too picky. My knees do like to come close to the top tube as I ride and I can adjust a bit based on how stuffed my bag is, but catching the hard edge of the zipper cover flap on the Apidura every pedal stroke was far too irritating for me. Your mileage may vary!
This bag has become one of my go-to bags. It is really well-made, stiff enough not to bulge out when full, waterproof, split compartments, zippers on both sides, and attaches with no sway. It fits the space on my gravel bike perfectly too (get the measurements from Apidura's web site). When out on a day ride, I can put my wallet, keys, covid mask and phone on the narrower side of the interior division. And I put an extra jacket, food, glasses, tire kit, etc. in the larger part.
Put this on my 2021 Jamis Renegade S1 Custom and fit perfectly. Went on a short gravel ride the other day just north of Boonville, IN and worked perfectly. Came home and gave my bike a bath and no water got inside the bag. One thing I could say is that the Velcro straps on the top are a bit stiff stick out a bit but I will come up with a way to fix that.
This bag has become a mainstay for my longer rides, not just for bikepacking. When the weather is changeable, and I might need to carry an extra pair of gloves or jacket, this bag is perfect to take everything along. It's split into two zippered sections, so I use one for clothing, and the other for phone, keys, etc. The Apidura site lists all the bikes and frame sizes around, so you can make sure it fits. Excellent bag.
I am touring cross country and during the day most of my load is packed away in panniers. I use the frame pack for easy access to tire repair supplies and also for snacks, sunglasses, small items I want during the day. I have a handlebar that allows for multi hand positions and a handlebar bag does not fit. The frame pack is a great alternative!
The large fit my 59 cm Warbird perfectly, great amount of space for everything you need for a full day on the roadtrail. I have ridden with it in some strong rain and everything inside stays perfectly dry. I would highly recommend this to anyone looking for a great half frame bag.
Got the 5.3L size for my Topstone XL, and it fits perfectly. Only used it on a few rides so far, but it has great build quality and lots of room for tools, water, snacks, clothing.