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Btwin 500, 0.4 L Saddle Bag

Sale price: $9.99 Regular price:
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Sale price: $9.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8354447

Product Features

Btwin 500, 0.4 L Saddle Bag is designed for transporting the minimum needed for bike repairs and small personal belongings.

A small, semi-rigid bag, that's easy to attach to and remove from any bike saddle. Foam lining to protect your belongings and reduce noise. Key pocket.

A photo of the Btwin 500, 0.4 L Saddle Bag in use


Capacity: 0.4 liters. Can fit a spare inner tube, tire levers, patch kit, etc.

Easy assembly/dismantling

Easy to attach using universal, dual fastening straps with rip-tabs.

Easy to use

Easy to open with the zipper Rigid reinforcement. Easy to clean with water.


Dual-attachment system onto seat post and saddle rail.

Item protection

Semi-rigid and foam lining to keep your belongings safe.

Multiple compartments

A small key pocket with a rip-tab strap.

Product Customer Reviews

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311 Reviews
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Btwin 500, 0.4 L Saddle Bag,black
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Lightweight Saddle Bag

Very affordable, works as it should and no problem in getting it from the various outlets it online.

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Hi Chee Kwang,

Thank you for taking the time to write us a review regarding our product: 500 Bike Saddle Bag S 0.4L - Black!

In Decathlon, we believe that to get this kind of information from our users is the best way to improve what we are doing. We are glad that you are satisfied with our products :)

Do check out more variety of our products at, and we hope to be able to serve you again in our stores soon! :)

Stay Healthy, Be Sporty!

Sport on safely!


Digital Interaction Relay

Too Small

Product quality is good, but the size is too small. In the product description it states it is able to hold an inner tube, tire levers, CO2 canister and puncture repair kit. It was almost full with a packet of tissues, set of keys and energy bar.

Hello Simon,

Thank you for supporting our product. We appreciate your insight and feedback as you motivate us to strive for outstanding product quality.

We are looking forward to seeing you again.

Thank you again for your support. 

Stay healthy. 



Decathlon Hong Kong Cycling Team


Good investment

Great size for tools and simple first-aid supplies

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Hi Woon Ying,

Thank you for taking the time to review our products. We are pleased to hear that this item meets your expectations!

We look forward to more of your reviews and sharing! Plus, the new Decathlon app has been launched and you can now purchase all your favourite sports goods with just a few clicks on your smartphone! Yes, it's now available both in the App store and Google Play Store! Download now and happy shopping!

Thank you for your support and stay safe! :)

Sport on safely!


CSM Digital Leader

Good saddle bag

Fits well to my bike saddle using the velcro straps. Light weight and water proof. Enough room inside for 2 inner tubes, set of 3 tyre levers and a puncture repair kit. Great value.

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Great bag, one small issue

Really roomy bag and great value. It looks stylish and compact but I've been able to fit a surprising amount in: 2 inner tubes, 2 levers, multi-tool, 2 CO2, and a mini pump. My only gripe is that the velcro strap which attaches to the seat post hasn't been attached in the middle of the bag meaning that it isn't possible to get it to sit straight. Not sure if this is a general issue or just a problem with my particular one.

Does the job

Excellent product at a very good price. Fits in a spare inner tubes, tool and tyre leavers. With all fitting snug inside and the adjustable straps connecting well to the seat i’ve ex no rattles or noises.

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Saddle bag 0.4l

Bag great and able to carry a spare tube,repair kit,levers,multi tool and gas cylinder, I am at a loss though as to why I was cared 10p for a PAPER BAG the 5p charge is for plastic so who gets this money??? Thinking twice now about any future purchases from there.

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Saddle pack

Used on tour of Flanders and had holes in it at end of ride. A good price but I expected it to last more than one ride.

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This product should last for years. We have not had such feedback before therefore I can only assume that it is a one off issue. Please feel free to exchange it at your local store without a receipt as you are a decathlon card holder.
Peter Lazarus UK Cycling Market Manager DECATHLON
Buen producto

Bolsa de sillin muy comoda para uso ocasional o diario.

Una buena opción

Ideal para llevar una cámara de repuesto para cuando sales

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calidad y precio

no es muy grande, pero es resistente y pequeño y no molesta. buen precio.

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Excelente relacion calidad-precio

Le he usado ya por varios meses y estoy contento con él. No tiene una gran capacidad pero alcanza para lo justo. Lo que llevo en él y va a tope es lo siguiente: una camara de repuesto, las llaves plasticas para quitar la cubierta, una mutiherramienta, un par de monedas de 1€, un adaptador de valvula presta por si debo ponerle aire en una gasolinera, las llaves de casa o del coche. Queda un poco de espacio para poner algunas tarjetas y billetes plegados, aunque llevo todo eso en la cartera dentro de un bolsillo del maillot. Hay un modelo un poco mas grande por 1€ mas pero este calza perfectamente bajo el sillin. Si quieres llevar masomenos lo que he detallado arriba lo recomiendo sin lugar a dudas.


Justo lo que necesito, práctico, cómodo y excelente en calidad-precio!!

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Esta muy practica

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Se acopla muy bien bajo el sillín y caben dos camaras, una mini multi-herramienta y dos palancas de cubierta.

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Additional Product Information


Outer fabric

  • 50% Polyester cationic
  • 50% Polyamide


  • 100% Polyester cationic


  • 100% Polyethylene low density


This bag can hold: - 1 road inner tube (700) + 3 tire levers + 1 multitool + 2 x CO2 cartridges OR - 1 MTB inner tube (27.5") + 3 tire levers + 1 multitool


This product has a hook for attaching a VIOO Clip, an LED light that can be clipped on and off anywhere in an instant. 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 130 yds 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).



Storage instructions

Dry the contents in case of rain.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual