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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.


Colour : DARK GREY

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until £239.00 - %

From £239.00**

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Price in store £0.00 £239.00 **

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Free delivery with Click & Collect
From : 10/10/2015 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

34 reviews

31 people recommend this product

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Solid Bike

Suspension, Gears, Brakes

Seat comfort


  (United Kingdom)

Under 20 years old    Man

5 5

used for 2 to 8 weeks I received the Rockrider 500 for my birthday, and am very pleased with it. It handles most terrains very well, but also is perfectly usable on the roads. The suspension is good, and the hardness of it can be adjusted using a dial on the right fork. The gear changes are generally swift, although I have found on occasion that the bike struggles when moving into third on the pedal gears. This bike has comes with disk breaks, so when on loose tracks, grit is kept away from the wheels. My only complaint, and this is just my preferences, is that the seat is too hard. An all round solid and well made bike.

rockrider 500


  (United Kingdom)


4 5

Great bike rides well. Bad points seat, and grips had to change straight away apart from that its a great entry bike to start off roading bough August 2015

Great value entry level all-rounder

Great spec for the low price machine

Nothing major yet


  (United Kingdom)

40-49 years old    Man

4 5

Had the bike about a month now and very pleased with the purchase. I was looking for a reasonably priced all-rounder that I could use for fitness rides on local hilly lanes, occasional commuting and also on family bike rides, so I decided against a road bike like Triban 500se at this stage. Having read a few blogs, I decided to swap the off-road MTB tires for semi-slicks as I'll mainly be riding on tarmac; she's running great on Schwalbe City Jets (26x1.5). Only minor gripe is that gear changes are a bit clunky and sometimes stick on the steeper hills. My first try at disc brakes and I'm loving them.

So far, So good

Overall product and price.



  (United Kingdom)

30-39 years old    Man

4 5

used for 2 to 8 weeks I bought this couple of weeks ago and i'am really happy about it .
I would like if possible to change parts to take weight of the bike down a bit .
Would someone , like a decathlon tech guy , give me advice on which part to replace to make the bike lighter ? And give me the name of the products from decathlon ?

Thanks in advance .

Grate bike

good ride strong,can take my weight 145kg

grip is not comfortable, i had to change.


  (United Kingdom)

40-49 years old    Man

5 5

used for 1 week or less i would recommend this bike to friends and other people, i wanted to get the orange color but it dose not come in XL size :(

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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