ROCKBROSROCKBROS Bike Saddle Bags with Water Bottle Pouch Waterproof Bike Bags Under Seat Pack for Mountain Road Bike Saddle Bag Bicycles Storage Bag 1.6L

Great product.

It's a large bag with a lot of room. I'm not sure about it holding a water bottle, but I still use the pouch for extra storage.

durable and extra room plus bottle holder

... after less than 200 miles with this bag (which I love) I discovered this amount of wear where the bag hits the seat post.I love the ease of install, the straps, and the double zipper design, but after seeing that amount of wear after such a short time I wonder about the overall quality of the bag.

Easy to install,looks good and works great !!Phone will fit inside of it.

I experience two issues that were reported by other reviewers. The first issue was the bag touching the back of my legs during pedaling. The second is difficulty getting a water bottle into the rear exterior holder. I fixed the first issue by installing a post-mount attachment between the seat tube and the bag. I had an extra reflector lying around and mounted it just under the bottom bag strap. This moved the bag further back about an inch which was enough to give clearance for my legs. The second issue I solved by removing the hard plastic sheet that is inside the bag to help it maintain its form. I had to cut away some of the orange material to get to the sheet (it looks like it is supposed to be removable, perhaps someone with more patience could do this without cutting), but once I removed that piece the bag will now conform to the shape of a water bottle so larger bottles will fit. I like the idea of this bag since it has more room than many seat bags (plenty of room for a spare tube and tools) and having the extra bottle holder is great for very long rides. With four straps total the bag is very secure on the bike and doesn't bounce around at all. For the price and with only a few little "hacks" needed I think it is fine. The material and zippers and velcro tabs seem to be robust and of good quality, so hoping this bag lasts a while.

I bought this because I'd been training this year for a century road bike ride and need more space for gear to cover my bases while out many miles from home, but also to easily carry a third water bottle to stay sufficiently hydrated. It's a pretty good quality bag overall, with some nice elastic organizer spots, and fits my Smith spare lenses in their protective cases. Mounts easily to the rails and seat post.Despite being a fairly larger saddle bag, it doesn't protrude much and thus doesn't inhibit leg movement, or look unsightly. It also is pretty stable with minimal bounce while riding, even on gnarlier roads.About the biggest drawback it has it a water bottle doesn't go in or come out with ease when the pack is partially or totally full, so you can't take the bottle out while riding and have to stop. I'd also say that the zipper pulls merit improvement, because the metal wires in them don't extend far enough into the rubber tab portion, so they bend too easily when pulling them, especially if the bag is chock full and snug to close.All in all I'd buy it again, which sadly I will have to thanks to FedEx losing my bike and equipment on return shipment from the race I recently went to.

I like how this fits under my seat as opposed to all the horizontal bags that look more bulky. The material seems to be good quality and should hold up well. Zippers are solid and should hold up well too.I find the size perfect. Some people will say its too small, others will say its too big. I find it just right.For me it works because I am able to fit my spare tube, cartridge, multi tool, patch kit, extra battery, plus have room for my keys, ID/cards, and my cell phone (S10+ w/ otter type case).One flaw is the interior mesh storage "pockets". They are too small to do much good, at least for me. One is a stretchy fabric holder for your multi tool, but mine won't fit even though it's standard size. The one for your ID/cards is good as long as you only have a couple cards. I usually carry 6 or more plus some cash, and it's too much.In their place I'd much prefer a divider to keep the cell phone separate. I worry mine will get scratched by my keys or my tools.My other issue is because of the sloped angle on the back side of the pack, my tail light points toward the ground a little. I just glued a piece of black plastic hose to the hanger of my tail light to solve that.Those two issues are way I only gave it 4 instead of 5 stars. It fit nicely on my Roubaix road bike and overall I am pleased.

This is a nice bag for gravel bike riders, it has a carbon fibre look in the sun and it fits a couple of co2 cartridges with adapter. Plus spares tubes and all in one tool. You can slide your I’d and card on the opening. I’m able to unzip and get into the bag without taking out the water bottle. For those who plan on using the water bottle aspect, I wouldn’t count on it. It’s difficult to get a regular size bike bottle into it and out. I’ve added a bear spray adapted water bottle that can stay in permanently. I ride a lot of logging roads in the wild and this is a nice setup for those looking for this type of setup. Since I leave my water bottle in permanently, I was able to zip strap the rear clip on light to a visible position. Otherwise it hangs to low that I doubt a car will see it. Now it’s perfect! Rock bros makes good stuff for the money. I own a number of their cycling products.

I'm a bit uncertain at this point. I was excited to receive this bag, it seemed like a good fit for my fat tire mountain bike.Immediately popped in my tiny multi-tool set, just a cheap one that came with the bike, it's a snug fit but it'll work. Or so I thought, until I installed the bag on my bike and found that I literally cannot get the tools out. They're stuck. In order to access I need to remove the bag from the bike, and remove everything else from the bag to bend the bag far enough to get in to slide the tools at all.Not sure if this is a dealbreaker or not, but it doesn't feel like the bag would be very happy if I made a habit of doing this. Ideally I won't make a habit of needing tools, but I carry them for a reason.It does have enough room for my mini electric pump, a light, and a few other goodies. I wouldn't store my phone there, but I like having it accessible if I pull over without getting off, so that's okay.As some other reviews noted, the "bottle pouch" is a perfectly fine pouch but it has no chance of holding a standard water bottle.Finally, the bag arrived dirty in the places I expect it to get dirty once mounted, so probably someone else had the same thought that I did, returned it, and here it is. Not a big deal, but I'd prefer to see it in the used-but-good-condition section. Not a big deal, if I keep it this is probably the cleanest it'll be anyway.

Stores a lot of stuff. Tools, tube repair kits, and multi-tool. When riding a fat bike, usually out in the woods. There may come a time when you need to fix a flat or tighten something up. This bag holds all of that. It's a big bag. My only gripe. The velcro straps could be longer were connected to the seat. To allow for a lower stance closer to the wheel. Reason. This bag is wide. Mount too close to the seat and it will rub on the inner part of your legs. Wearing out your shorts.

I use this on trails to hold my phone and keys. They get bounced around loads and the screen protector cracked a bit. I haven’t used a water bottle in it but don’t feel it would stand up to a bumpy off road ride. It would be excellent on smooth roads and trails.

When you first read the discrimination it’s tricky coz you might think water bottle included so before you purchase it read carefully. It’s only the bag not included the water bottle. Other than that it’s good for my bike.