BV Bicycle Strap-On Saddle Bag with perfect Size I With reflective for a Safety ride I Seat Bag, Cycling Bag - Bike Bag for all our essentials, bike bags for bicycles, bike seat bag

We have used the large BV saddle bag as a tandem stoker bag for several years with excellent results. We recently added a new tandem to our collection and bought a second BV bag for our new bike.These bags fit well (check the dimensions on your bike), the seat post Velcro strap works, the saddle strap can easily be wrapped over the stoker stem on top, and we add a length of double-sided Velcro to the fabric loop underneath the bag to wrap around the stoker's top tube. It is easy to install. The bag opens from the top facing the stoker, and is durable and spacious. There's plenty of room for a spare inner tube and a power bank to run the stoker's iPhone. Recommended for this application.

It has the extra space I needed to keep my security cable and lock. Well built and functional.

I'm not surprised that this cycle seat bag has such high reviews (and top seller in category if I'm not mistaken). The bag comes in three sizes, for this review I will only discuss the Large size.Good:-Construction is solid. No obvious defects or points of potential failure.-Ample room. I was able to fit (without using expansion):-Multitool-CO2 cartridge and adapter-spare tube-two tire levers-latex gloves with patch kit and link-2 cliff bars-a concealed carry (Sig Sauer P238).-There was space for my car key and my phone as well, but that would be about the limit without expanding it.-Internal hook and mesh netting for keys. Extra layer of security.-Simple attachment mechanism.-Thin profile -- does not stick out wider than even a narrow seat.Bad:-Seat tube strap is FAR too long to give a tight fit. You will have to cut and resew if you wish to have it snugly attached to seat post.-Has a horizontal strap on back to attach light. Most lights attach horizontally because they would normally go around the seat tube. Consequently, I had to attach my light sideways. An additional vertical strap just above the horizontal strap would resolve this problem.-Bag does sway side to side, but this is unavoidable. During riding I do not think it will affect anything. Only way to avoid is to have an internal frame so you can tighten the seat strap completely. Without frame, the bag will just collapse in on itself. During rides, it may be a good idea to cinch down the strap fully and let the bag compress onto the contents to minimize swaying.Bottom line: The bag is great and I would absolutely recommend it. To the manufacturer, I would suggest incorporating my two recommendations (seat tube strap length & vertical strap in back) for future iterations of this great product. Until the manufacturer applies the recommendations, a rider can always take the bag to a sew shop and have the modifications done for just a few dollars.I've included a couple pictures: A side profile with ruler (~6.5" deep) and a perspective angle.

This is a wonderful little bag. It is thoughtfully designed, sturdy, and useful. I’ve only used it for short rides of about an hour each, but appreciate the comfort of knowing I am carrying everything I need to fix a flat in a package that is easy to install and remove, tucks securely under my seat, doesn’t wobble around or get in the way of my riding, has reflective tape, and a double zipper for easy access from both sides. Mine is size “large,” which I would call “large enough.” On my Polygon Extrada 7 MTB, it holds an inner tube for 29”x2.25” tire, multi tool that is 3”x1.75”x1”, 3 tire levers, small patch kit, CO2 inflator with cartridge, and 10”x12” microfiber towel. There is about 2 cubic inches to spare, like 2 energy bars. It’s good to know that there is also extra room in the drop down pouch should I need it. Yesterday I had a flat rear tire and I was back on the bike path in about 15 minutes. Was I glad to have everything I needed! I’m also glad I ordered a “large.”

Even large size is very compact - fits nicely tucked under bike seat. Strap fill secure but clasp is plastic so hopefully it will hold up. Love the back and will get a lot of use out of it. It’s a bit smaller than I expected, but can cram a lot in there. Does NOT fit a water bottle - I wish it would. My only other comment would be that my bike tail light doesn’t attach well to the loop style. I wish they had some sort of built-in reflector at least. This bag will completely block your tail light if attached to the Bike post

It is small but expandable. It easily holds an extra bike tube, tire irons, patch kit, keys, cell phone and garage door opener without opening the expansion. It opens in a way that all of your stuff does not fall out when you open it. It is made of durable material and should hold up well!

Perfect size for tubes and tools across Iowa (RAGBRAI)

The bag itself is fine.The issue is the velcro strap that attaches the bag to the seat post.The strap is too long and wraps all the around the seat post.Hence the velcro can not stick to the fuzzy part of the strap.I will have to manually cut off the velcro, cut off some of the strap to shorten it, and then sew the velcro part back on to make this work.