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The no. 1 sports MTB: alu frame and disc brakes.

All Bikes Cycling - Rockrider 500 Mountain Bike B'TWIN - Bikes
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B'TWIN Rockrider 500 Mountain Bike

The b'Twin Rockrider 500 Mountain Bike is perfect if you're looking to get into hitting the trails. With a lifetime warranty aluminium frame, front and rear disk brakes and a SRAM 24 speed drivetrain you can be confident that this bike is built to last.

To view our full range visit our mountain bikes category.


Please select a size

Please select a size


until £239.00 -21 %

From £189.00**

DecathlonDeeeTaxMentionAfterPrice /

Price in store £239.00 £189.00 **

Reserve in store

From 14/10/2015 To

** From 12/10/2015 To

* Sales from to Until end of stock
** Sales from 12/10/2015 to Until end of stock

From and limited stock

* Sales price at

From and limited stock

* Sales price at

* From 14/10/2015 and limited stock
** From 12/10/2015 and limited stock
Free delivery with Click & Collect
From : 01/12/2015 with this item
Reference : 8293150

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.

Our customers pictures

Product benefits

    • User comfort
    • Raised riding position, for efficient, painless cycling. Lamellar grips.
    • Efficiency
    • Aluminium frame: lighter and higher performance. 160 mm double disc brakes.
    • Easy adjustment
    • INNOVATION: adjust the fork to your weight in less than 1 minute
    • Lifetime warranty
    • B’TWIN guarantees the frame, stem and handlebar for life.
    • Precision
    • Disc brakes provide powerful braking in all weather conditions. Trigger shifter.
  1. Guarantee : Lifetime warranty for frame, stem and handlebar on this bike. Details on

Product information

XS:135-150; S:150-165; M:165-175; L:175-180; XL:180-195
Wheel size
26 inches
Suspension fork
14.07 kg (XS) without pedals

your reviews

4.4 / 5

40 reviews

36 people recommend this product

Write a review
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Nice bike ......but !

Seems well built, good value,looks smart

Not quite as advertised


  (United Kingdom)

50-59 years old    Man

4 5

used for 1 week or less I spent a couple of weeks looking into getting a new bike and this one fitted the bill for spec and budget.
Went to the Wednesbbury store and had great help and advice,but decided to order online for home delivery/self assembly. So it came this morning and first the good points,
It seems well made and well finished, no scuffs marks or damage looks smart for the money, I have had a short ride and it seems comfortable no odd noises or anything.
Now not so good, according to the assmbly vid just turn the stem round fit pedals check brakes and away you go! Not quite! on mine the handlebars were pointing down and the brake levers shifters and bell all needed to be moved round, not a big deal but if your not confident with stuff it might be best to get your bike assembled in store.
More anoying my bike has not got the much vaunted new easy weight set forks just a standard black + - adjusting knob and lastly for some reason it had a piece of masking tape stuck down one side of the fork which when removed pulled the top off one of the smart decals on the side, yes I know that it is a bit pathetic to be upset by that but it is brand new after all.....
I suppose really this could have been a 5* review as none of the issues is a fault with the bike, but the fact is the issues have left me a bit dissapointed, maybe I should have ordered from the store after all

Great return to cycling

Excellent value and quality finish

It got discounted a week later! Hey ho..


  (United Kingdom)

50-59 years old    Man

5 5

used for 2 to 8 weeks Researched online for 3 weeks before deciding on this bike. The guy in the Stockport store was helpful and knew what he was talking about. The bike has a great quality feel about it, so different from 'back in the day'. It even came with basic lights which I didn't expect. I'm changing the tyres for Schwalbe City Jets but thats all for now. Saw it had been discounted a few days later so bought one for the wife too, happy days!

Good value bike

Bought as present great value

No local store


  (United Kingdom)

50-59 years old    Man

5 5

used for 2 to 8 weeks Bought as a present for my adult son he thinks it's great

Well stung

Looked good

A lot of parts needed replacing


  (United Kingdom)

50-59 years old    Man

3 5

used for 2 to 8 weeks I am not very happy I bought this bike 3 weeks ago and thought I was getting a bit of a bargain, although I had to upgrade a few of parts eg saddle, grips, Now I have noticed it has been further reduced by £50 I am not a happy punter.

Response of the brand

Dear sir,
The bike was reduced only a few days following information sent to us.  When you purchased your bike I can assure you that no decision had been taken at that point to reduce the bike as the launch date of the replacement model had not been confirmed. It is totally natural for a product which is being replaced by another model to be reduced in order to clear space for the new item. We will be transparent about our pricing and as soon as we have an opportunity to pass on any savings to customers we will.  You can be confident that we will never inflate any of our prices to make it seem as if you get a fabulous discount. Our aim is deliver the most consistent low price in the market for an equivalent quality product and we will always work hard to do so.
Peter Lazarus UK Cycling Market Manager DECATHLON

David did not find this review helpful

Seat is not comfortable for rock rider 340

Stylish and easy handling

Very uncfomfortable with rockrider 340 Seat



20-29 years old    Man

4 5

used for 2 to 8 weeks Two weeks back i purchased Rockrider 340 from the Whitefield branch ,Bangalore ,used it for two weeks . Seat is very uncomfortable giving more pain on my back. Front derailleur not placing chain on wheels properly always giving cranky sound. I am totally not happy on these both cases.

Technical Information

  • 1

    Frame BTWIN SPORT MTB frame, in strengthened 6061 aluminium.
    Sports geometry, perfect for intensive mountain biking.

  • 2

    Fork NEW! BTWIN fork, 80 mm travel, with EASY hardness adjustment system: just turn the wheel to YOUR weight indication. You'll be off in a flash!
    High-quality dampers with surface treatment offering remarkably smooth suspension.
    High-quality steering ring mounts to prevent water, dirt and debris entering the blades: much more durable fork.

  • 3

    Suspension No rear suspension.

  • 4

    Drive train SRAM 22x32x42 triple-chainring crankset
    SRAM X4 rear derailleur
    MICROSHIFT M30 front derailleur
    New SRAM shifters with indicators for the 24 gears
    SRAM 11x32 cassette.

  • 5

    Brakes TEKTRO aluminium brake levers: lightweight and precise.
    HAYES MX5 front and rear cable disc brake for: powerful, progressive braking, even in rainy and muddy conditions.

  • 6

    Handlebar Rockrider SPORT handlebars - 600 mm (XS et S) and 640 mm (M, L and XL) wide.

  • 7

    Stem Rockrider SPORT stem, diameter 25.4 mm. Length: 90 mm (XS and S) or 110 mm (M, L and XL).

  • 8

    Steering Aheadset Rockrider SPORT headset, 1⅛".

  • 9

    Saddle Ergonomic B'TWIN SPORT Viper saddle in polyurethane.

  • 10

    Seatpost Rockrider SPORT 29.8 mm diameter seat post.

  • 11

    Wheels BTWIN SPORT double-walled rims, with 32 spoke eyelets,
    BTWIN SPORT hubs,
    Stainless steel spokes, 2 mm diameter: impact and corrosion-resistant.

  • 12

    Tyres 26 x 2.00 SPORT all-round MTB tyres for excellent lateral traction.

  • 13

    Pedals Wellgo MTB platform pedals with toe-clip for holding the foot firmly in place.

  • 14

    Accessories Compatible with mudguards, bottle cage, bag under the saddle, rear pannier rack etc.

  • 15

    Weight 14.07 kg in XS without pedals.

  • 16

    Electrical assistance No electric assistance.

Information / Concept / Technology

Stock advice

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

Care instructions:

Grease your chain regularly and check your tyre pressure often (recommended before each outing). Check your housing every three months and ensure screws and nuts are tightened properly.

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