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Suspension frame, fork with lockout, disc brakes.

All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
  • All Bikes Cycling - Rockrider 6.3 2013 Mountain Bike, Black B'TWIN - Bikes
Reference : 8208677
All Bikes

B'TWIN Rockrider 6.3 2013 Mountain Bike, Black

MTB riders getting started with off-road riding in the country or mountains. Make yourself comfortable!

To view our full range visit our mountain bikes category.


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available from £3.99.

Freedom of Return
find out more about our returns policy.

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Important: When you purchase a bike online, pedals are not fitted and the stem/bars are not adjusted. Please visit this video to see how to correctly set up your bike.

Life Time Warranty: B'TWIN makes the life time warranty for the frames, brackets, stems and rigid forks. Guaranteeing your Bike for life!

Product benefits

  1. 1
    Lifetime warrantyB’TWIN guarantees the frame, stem and handlebar for life.
  2. 2
    CushioningRockrider 120mm fork with lockout, 120mm shock: great comfort!
  3. 3
    Low weight / lightweightReinforced aluminium frame and components.14.9 kg in size S.
  4. 4
    Accuracy / precisionShimano 27 speeds. Powerful mechanical disc brakes.
  5. 5
    Anatomic designOptimal "off-road" ergonomics: no more back and neck pain.
  6. 6
    Ease of useSuspension stiffness can be adjusted without tools: ready in 2 minutes.

Guarantee : lifetime warranty for the frame, stem and handlebar. Details on


Product information

S (155-165cm), M (165-175cm), L (175-185cm) & XL (185-195cm)
Wheel size
26 inches
14.9 kg in size S

Technical Information

  • 1

    Frame New oversize aluminium 6061 S.I.X frame, 15% tougher and lighter than the previous version. 120 mm rear travel, based on the famous "monopivot" system, which offers great sensitivity to small bumps and remains sturdy under large impacts. System mounted on sealed bearings for good durability. Comfortable geometry and effective steering. Caster angle at 69° for more stability. Weight= 2.7 kg in size M, without shocks.

  • 2

    Fork Rockrider 120mm fork, with adjustable preload (stiffness of inner coil) on the left leg: simple to adjust and easy maintenance. Wide dampers (32mm), for more rigidity. Lockout lever on the right leg, to avoid bobbing on rolling ground (road, smooth path, etc.).

  • 3

    Suspension Hydraulic coil shock, with shock stiffness adjuster. Can be adjusted by hand at any time without tools.

  • 4

    Drive train Suntour XCT 22x32x42 chainset. New generation Shimano Acera front and rear derailleur: straight, quick, effective and reliable shifting. Discontinuous cabling for lower weight and higher precision. Derailleur levers directly built into the brake levers, for better weight and good integration of all parts on the handlebars. 9 speed SRAM ESP 5.0 cassette, 11x34. SRAM chain with quick-release.

  • 5

    Brakes Hayes MX5 mechanical disc brakes, offer a biting brake that is easy to control. Easy maintenance and adjustment. 160mm front and rear disc. "Postmount" front and rear calliper, screwed directly onto the frame/fork: to reduce weight and make adjustment easier.

  • 6

    Handlebar Oversize 640mm diameter Rockrider Sport aluminium handlebar, for better rigidity and stability on descents.

  • 7

    Stem Rockrider forged aluminium oversize diameter stem, for more rigidity. The components are marked to help you find the best setting.

  • 8

    Steering Semi-integrated A-headset, for better watertightness, precision, and a built-in look. Rockrider mono-density grips, length: 120mm.

  • 9

    Saddle New Rockrider by Selle Royal saddle: injected polyurethane with ventilation and anti-tear coating on the sides.

  • 10

    Seatpost Rockrider 29.8 mm diameter seat post, length: 350mm. Quick, tool-free anodised saddle tightening.

  • 11

    Wheels Rockrider Sport wheels, with 32 hole double-walled aluminium rims: guaranteed shock and warp resistance, and lightweight! Aluminium hub compatible with disc brakes only.

  • 12

    Tyres Front and rear KENDA Nevegal 26x2.10 rigid bead tyre, known for its versatility: behaves well on all types of surface, whatever the weather (dry or wet), thanks to its deep and well distributed tread, and its soft "Stick-E" rubber which provides good grip. Tyres with inner tube.

your reviews
(8 reviews)

rockrider 6.3

, The 25/03/2014

5 5

the bike looks amazing

a tad heavy

I've tried my friends bike 6.3 feels and looks fantastic, I've also been in my local decathlon to price one up for this week for myself, looks and feels even better with the new look about it, slightly heavy, although full suspension is supposed to have a little extra weight, it's nothing to heavy though, and can be easily overseen for the price and looks of the bike, I'm getting my own 6.3 rockrider this week and can't wait, I shall post a full review once I've had more time on my own, .

good for the money but dont abuse it.

, The 15/02/2014

3 5

tyres and cable brakes are not bad for price.

most things.

i bought this bike last summer 2013. within 2 months forks had to be replaced due to not working correctly. now just Christmas gone, back suspension now isn't as good as when new but considering i do lots of down hill tracks e.g. forest of dean chicksands, witch isn't meant to be used for downhill use so my own thought. loads of new bits need doing to it now e.g. new bolts rear mech, wheels buckled. looked and rode the dogs balls but don't be mislead like i was. buy for cross-country only!

Response of the brand

Dear Sir,

Sorry to read that the bike does not meet your needs. Indeed, this is a full suss X-country bike and not designed for downhill use. The frame is itself solid but the components at this price range will indeed struggle to cope with this kind of riding.


Peter Lazarus
UK Market Manager - Decathlon


, The 02/02/2014

1 5



This bike is absolutely terrible I've had a more reliable bike out the skip

I would only recommend this bike to the consumer protection agency

Response of the brand

Dear Sir,

We are getting in touch with you to help try and understand the root cause of each of the issues you have encountered with our bike. I'm sorry to read that your riding experience has not been as pleasurable as it should have been.

Your local store will contact you very soon to help find a long term solution which will allow you to continue enjoying your cycling.


Peter Lazarus
UK Market Manager - Decathlon

Great bike

, The 13/01/2014

5 5

Comfortable, looks good

Not found any yet

First bike to get into mountain biking. Wasn't sure about the decathlon range but looked into them and they had good reviews. Use it for commuting on roads and is very good. First ride on the mountains and very impressed. Everything works perfectly. Nothing negative to say about it.

Good for the price

, The 08/01/2014

4 5

Looks, breaks, frame...


Seems good for the price and really nice looking in size S! Even size S is adequate for most riders having handlebars at the right height and seat can be lifted more than enough! However, forks are ridiculously soft! To the point where one could deem them faulty! So soft that they are not even able to hold the weight of the bicycle alone without compressing a few mills. So until I change the springs (voiding the warranty which is simply wrong) i will not be able to use the bike off-road.

Information / Concept / Technology

S.I.X. suspension system: "Monopivot" suspension for greater simplicity and sensitivity on 120 mm travel

Restricted use :

not designed for: BMX, Dirt, Freeride and Descent

Stock advice

Store in a cool, dry place, away from corrosive products and salty air.

Care instructions:

We recommend reading and following the maintenance instructions found in the manual that comes with your Rockrider bike. The maintenance instructions and component settings are available on The safety visit (3 months after purchase) at your local store's workshop is FREE and RECOMMENDED.