Bike Triangle Frame Bag Waterproof 1.5L Bikepacking Bag

I’ve been using this triangle bag for a few months now, and I’m really happy with how well it works with my bike. I ride a Specialized Turbo Levo 3, and if you own one, you know how hard it is to find a frame bag that fits properly due to its narrow frame profile. To my surprise, this one fit really nicely. I just had to mount it upside down, and it worked like a charm! It sits securely without interfering with pedaling or cables. Installation was pretty simple, just use the adjustable velcro straps. The bag stays firmly in place, even on rough terrain. I’ve ridden in light rain, and the water-resistant material kept everything inside dry. There’s plenty of space inside for two water bottles and some snacks. The wide zippered opening makes it easy to access what I need quickly. The zipper on the other side feels a bit useless, I never really use it. The build quality is good, but the structure could be a bit firmer. I wish it had a bit more rigidity to help it hold its shape better. If you have a Turbo Levo or any other bike with a tricky frame layout, definitely give this a try. It’s a compact, practical, and affordable solution for carrying the essentials. Highly recommended!

I love this bag! It replace another Rock Brothers bag - a top tube bag that was nice but got in the way when standing over the top tube. This bag fits nicely under the top tube and is out of the way. I installed side entry bottle cages to make it a little easier to access my water bottles. I ordered the smaller size and still had plenty of room for two tubes, electric tire pump, multitool, and battery backup for my phone. I put tape under the mounting straps to prevent and marring of the frame. Bag attaches well and has a front opening to allow running a usb cable from my backup battery to my phone. I definitely recommend!

very well made but the problem I found is if you have a water bottle cage, and a bottle in that, this bag gets in the way. So I cannot really use it unfortunately.

The bag hits all the marks: ample storage for wallet, keys, extra tube and more on one side of bag then other side has thinner side for tire levers or thin items. Bag fits under bar fine on size “large” (size 56-ish) Kona cross bike and does not impede access to water bottles. Bag is sturdy, is held in place firmly by the included Velcro straps and bag does not hit legs while pedaling. Tested it on long rail trail and the bag does not move around when loaded with items. Have not tested it in rain yet but it appears very water resistant and even then in any bike bag I would place wallet, etc. in plastic bag or small dry-bag. Price is right and gray color is fine even though my other bags on the bike are black. Will update review after more miles are on this bag. All around appears to be a great purchase and addition for bike travel.

I like a top bar bike bag. It must be fairly narrow and not wobble to much while riding. This is long enough to firmly attach front and back and keep it stabilized. Though narrow, I get all my tire repair tools and a battery powered bike pump, and a full set of bike tools. I still use a small seat back pack for the overflow. All at a reasonable price. I have not experienced a significant rain shower, so can't rate waterproof. The included straps are a bit stiff. I replaced one that I loosen to store my bike for easier use. It's probably too narrow to hold spare cycle clothing and anything else. I highly recommend this bike bag.

Perfect for still carrying water bottles or the bottle bag tool kit. Will hold a fair amount of trail mix and power bars. Repair tools, tube, keys, first aide. I use this with a small above the top tube bag, bar bag, and rear rack with bag and panniers for all day gravel rides. Food and clothes. This is a great under top tube bag if you are not going to do the one that fills the entire cavity were water cages are no longer used.

It’s clean looking, the zippers are hidden, 2 sides, main storage and a slim pocket. Fits on both of my bikes (only two? I’m working on that.) The Velcro straps get a little challenging to tuck in completely, but better with use. Only real complaint, I can’t fit my cell phone in the slim pocket.

Posting these early in case they can help someone else. Both bags from Rockbros. Both come with 5 hook and loop fasteners, (1 front, 1 rear, 3 on top) with some flexibility on exact placement. Both have a zip opening on each side - right hand side to the main compartment; left hand side to a slim pocket. Right hand side is full height, left hand side (because of how it’s bonded) is about 1/2” shorter than the bag. Both well made, look to be shower proof and both have there attachment points bonded to the main bag (not stitched). This bag (the smaller one) is sufficient for tube, basic tools, small pump and basic first aid kit. Slim side may be good for band aids, very slim lights, wipes, bandana etc. - that side is not large enough for a smart phone. The large side is large enough for a smaller iPhone height wise - may want some sort of separation from tools.

Very nice waterproof zippers, separate small compartment for small items. Fits my pump, tool set, wallet and a little room to spare. let's me still have two water bottles attached below easy to strap on. On my 2025 Specialized Diverge E5

Product is good quality (material, zippers, and velcro straps) and fits my road bike frame well. Can store a small pump and tools even light jacket etc. Great to use when you can avoid a backpack.

good size, well made, looks okay and works well enough. Large enought ot hold my very large cell phone. It has absolutely NO water resistance at all. In fact it seems to collect and hold water, but on top of that somehow the inside is waterproof so water cannot drain out... yes you read that right. As long as you do not need a water proof frame bag this is a very good bag and I would totally recommend it because it offers good value.

Lots of room for snacks, glasses, hand sanitizer, lipbalm, car keys and other small items, install on top tube either over or under depending on frame. Not waterproof.

Good size bag for my limited space on my EBike. Comes with a lot of Velcro to strap it to the frame