IDEAL CAPACITY: 0.75 liter capacity, good for holding daily essentials. Bike Bag under seat is roomy for gas cylinder, tube, tools and miscellanea, small wallet and/or keys. If there need a little extra space it has an expansion zipper which will add a decent amount of space.
STRAP-ON DESIGN: Upgraded stylish design bike saddle bag. Concise style, better material, better size. Fixed securely with 2 strap, the straps fit securely and neatly under your saddle and around the seat post which suits for the most road, mountain and commute bikes.
REFLECTIVE DESIGN: The both sides of this water - repellent saddle bag have reflective logos to increase night visibility in low light or dark conditions. It has a loop on the back which allows you to clip on a bike light. ( Tips:Taillight doesn't include in the package )
EASY ATTACH ON & REMOVE: This saddle bag is the wonderful size, aero and has two strap that wrap around your aero seat post. And it can hugs the seat very tightly up an out out the way. It is easier to take the bag off of the bike and then re-attach it when needed.
INNER COMPARTMENTS: Convenient for you to separate bike tools, keys or somethings which need to. The bike seat bag will hold the basic needs of the ride.

Lukas Arias (comprador verificado) –
bonito
bonito y facil de instalar, no creo que contenga una lluvia, el cierre trae una parte que no sella con el “impermeable”
the menace (comprador verificado) –
in this case, this was the right shape for what i needed
not all saddle bags are the same. fairly equal in capacity and craftmanship, but in this case, a slight variation by rock bros, helped when other bags did not. this bag allowed for my mini pump to be stored. big plus.
Clem wixted (comprador verificado) –
Suits most bike seats
This expands to suit extra tubes.
Yung Fang Smith (comprador verificado) –
Fits all you need for a ride
This review is for ROCKBROS Bike Saddle Bag, Bike Bag Under Seat, Strap-on Cycling Wedge Pack, Bike Seat Storage Bag for Mountain Road Bikes, 0.75L.It was a bit larger than I was expecting, It sticks out past the end of my saddle by a couple inches.I’m pretty happy with it. I stuck a 700c spare inner tube, 3 tire levers, a multi tool, aCYCPLUS Tiny Cube Bike Pump, an inner-tube patch kit, and my little wallet (kind of like ridge wallet) in there without even needing to open the expandable zipper area. I could probably cram a granola bar in there too, but it was pretty full with those items.one thing that seems a little strange is how long the velcro strap that goes around the seatpost is. I guess they made it that long for those REALLY aero shaped seat posts.
Oliver Schreiber (comprador verificado) –
Too small!
It is well made, looks solid, but it is quite small, even with the totally unnecessary extra zipper that makes it a bit wider when opened. You can just put in one spare tube, the repair kit and your keys. That is about it, the smart phone does not fit, even if I put nothing else in. The saddle bag is too short for a standard Galaxy! Rockbros, make it about 30% bigger and it will be a good product!
Mik Ponder (comprador verificado) –
Fits tightly under saddle!
This is a nice tight bag. Feels very well built and it holds one tube a few tools AND a small rechargeable pump. Sits up tight below the saddle with no slop or flopping around. Very pleased!
Tom-Miller (comprador verificado) –
Good bag
Works well enough. A lot cheaper than the bags at the local bike shop
Diego Ospina (comprador verificado) –
Excelente
Muy bueno y fácil de instalar
Charles Carr (comprador verificado) –
Perfect size seat bag!
This Rock Bros seat bag was purchased for a ‘ flat tire bag’ for my ebike, and works flawlessly. The straps that fasten it to the seat rails are leather and pliable, and fasten securely with velcro. The bag is water proof, with a waterproof zipper. A rare feature I haven’t seen on other seat bags is the zipper running down the bottom side that allows the bag to expand quite a bit when unzipped, allowing a little more valuable storage space. With the zipper closed, in this bag I keep a new 27.5″ x3.0 tube, 2 Large sized compressed air cylinders, a valve for those cylinders, and 2 break-down levers.All neatly stored beneath the seat and easily accessible. Rock Bros. makes good quality bike accessories, and this bag is no exception.
Verplankman (comprador verificado) –
Seat bag
Decent size, maybe want bigger if your carrying tools..will definitely fit some keys and money and a fat j..good quality, good price. Recommended
bacalhau75 (comprador verificado) –
Nice saddle bag.
not big enough for an android phone, but fits a wallet and some tools. Im not too thrilled about our the seat post Velcro secures it’s too long, it extends past the bag. other than that it looks great.