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900 Waterproof Bike Saddle Bag 2.5L - Black

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Sale price: QAR 109,00 QAR 109,00

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Never leave a thing behind! This large bike saddle bag makes it easy to carry tools and items on your bike rides, hands-free.

A fully watertight saddle bag with a very large capacity.

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Sale price: QAR 109,00 QAR 109,00

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Product Features

A photo of the 900 Waterproof Bike Saddle Bag 2.5L - Black in use


Capacity: 2.5 litres.Can hold a repair kit and some personal items.

Easy assembly / dismantling

Universal, dual fastening under the saddle using rip-tabs.

Ease of use

Canyon-type opening (circular).


100% water resistant to tyre spray.

Product Reviews

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439 reviews

900 Waterproof Bike Saddle Bag 2.5L - Black
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Only one drawback

Excellent size, and seems good quality. Only issue is the difficulty in tucking the opening away when riding.

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Perfect saddle bag

Good size, waterproof, easy to mount & remove. Great value for cashola. Very highly recommended.

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Love this fully waterproof

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Good in parts

Bag itself is good, well made. Access is a little constrained as the 'neck' is narrower than the largest part of the more rigid bag. Keeps water out. Geometry of the fixing is however poor. The saddle rail straps (on the top) are too close to the small end so the seat post strap must be fastened just below the saddle, exactly where it is likely to rub against your shorts. The hard edges of the strap then rub thro the short fabric...not great. One pair of shorts damaged after 100km ride. Bag is big enough to move saddle rail straps closer to opening end and hence allow the tube trap to sit further down.. more akin to the larger bags from other makes, or a different post strap arrangement that is thinner (ie not a velcro strap). To avoid this damage I have used duct tap over the seat post strap to avoid the edges causing damage. O

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Useful bag

Although it fits under the bike-seat, the bag is big enough to hold my bike-lock and other essentials and it's comforting to know it's waterproof. Being of soft material makes it more flexible, but probably less smart.

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Great design but saddle strap failed

I have been really happy with this bag, 100% waterproof, roomy and without sway during the winter months last year. Until today that is, one of the velcro strapt that holds the bag to the saddle rail has failed, ripped in half. I have checked my rails, no sharp edges (fizik Kurve snake).

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Dear Sir,
I agree with you that this is a great bag. I use one myself for very long days out on my road bike. However I'm disappointed to read that the strap has broken.
I will forward this on to the design team at b'Twin.
Peter Lazarus, National Cycling Manager, DECATHLON
Not waterproof!

There is a reason it's cheap. Great in the dry but leaks like a sieve in the rain - holds a lovely puddle of water inside though just to make sure all your things stay nice and wet

I'm sorry to read that you had water inside the bag. The fabric itself is waterproof and the seams are taped. I wonder if there was actually a hole in the fabric. Please return the item to us and we can refund/replace the item for you.
Peter Lazarus UK Cycling Market Manager DECATHLON
Excellent value for money.

Bought mine in June and it is a proper investment. Can throw all the repair stuf needed in there, plus keys, phone, gels etc etc. Leaves my pockets feeling far less weighed down! Only gripe would be about the closure as this is a bit messy. But all in all a great bag.

Straps ripped

Bought this less than 2 months ago. Have only used it for commuting to work a couple of times and the straps have failed. Its a shame as it's a good size and is very waterproof. If i still had the receipt i would exchange it for another and modify the straps to improve it.

You can still return this item even without a receipt as it exclusively sold at Decathlon.
Peter Lazarus UK Cycling Market Manager DECATHLON
Excellent product for the money

Sits well on saddle ,great capacity . Could be improved by a better closure but still is easy to access contents.Easy to fit

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limited access

This product is fine but the opening is quite narrow so it is difficult to get things in or out quickly. For example if you put your keys phone and wallet in, and you need to get the key out, you feel like you are scrabbling around at the bottom of a tube. if you pull your waterproof jacket out quickly everything else falls out at the same time. As long as you are aware of this, its fine. Super light weight at 110 grams and quick to attach and remove from the bike.

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One bag for all your bikes

I Spent a long time looking for the perfect saddle bag and I think I've found it. Waterproof, large, no special brackets so can easily be transferred between bikes. I now only need one set of tools/emergency rations and only need change the inner tubes to suit the bike that the bag is fitted on.

Btwin waterproof saddle bag

Easy to fit big enough for spare inner tube repair kit tyre levers & more

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Good size and design

Good design, holds all repair kit as well as keys, phone etc. The fastening at the back does not close completely and my tyre levers fell out a few times. However, by securing the opening with a bulldog clip this problem can be avoided.

Saddle Bag for commuter cyclist

It's large for a saddle bag making it useful for real commuters i.e. if you want a to carry a spare tube, small mini pump and a sandwich. Trouble is you have to take off saddle to avoid it from being stolen which isn't really the Saddle's fault. It;s a no frill but plenty practical saddlebag and I have bough two.

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Additional Product informations


Main fabric

  • 100% Polyamide


  • 100% Polyurethane


This product has a space for fitting a VIOO Clip, an LED light that can be clipped on and off anywhere in one go.With a red or white light that can be used in continuous or flashing mode, the VIOO CLIP makes you clearly visible from up to 120m away. Battery life is 9 hours in flashing mode, 4½ hours in continuous mode. Easy to recharge via a USB cable (sold with the VIOO Clip).

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