errorSearchInfoBulle messageErrorEmptySearchZone
  • DecathlonCompletionCategoriesTitle
  • DecathlonCompletionTopSearchesTitle

My Basket (0)

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

All Bikes Cycling - Rockrider 500 Mountain Bike B'TWIN - Bikes
Reference : 8293150
All Bikes

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 and the color of your article

Please select a size


until £239.99 - %

From £239.99**

DecathlonDeeeTaxMentionAfterPrice /

Price in store £0.00 £239.99 **

Reserve & Collect

From To

** From To

* Sales from to Until end of stock
** Sales from to Until end of stock

From and limited stock

* Sales price at

From and limited stock

* Sales price at

* From and limited stock
** From and limited stock

Home Delivery
free on orders over £70* - More information

Freedom of Return
find out more about our returns policy.

Safe payment
PayPal, Verified by VISA & MasterCard SecureCode.

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.
    • Accuracy / precision
    • Disc brakes provide powerful braking in all weather conditions. Trigger shifter.
    • Compatibility
  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

4.6 / 5

13 reviews

12 people recommend this product

Write a review
Sort by :

Rockrider 500

Great bike for the money

None as yet


  (United Kingdom)

50-59 years old    Man

5 5

used for 1 week or less Originally intended to buy a Carrera Subway but discovered the Rockrider 500 and went for it.
First day out was getting used to cycling again after twenty or so years, then second ride was out for five hours.
A few tweaks here and there and I had everything in my ideal riding position.
This is an amazing bike to ride, smooth gear changes without any grinding or clunking and the powerful disc brakes give you so much stopping power and confidence, though they squeak when its wet, don't know if all disc brakes do this?
I like the plastic toe clips which keep your feet in the correct position on the pedals.
The staff at Decathlon in Wednesbury were really helpful and patient with me and helped me buy the bike I wanted, not sell me another.
I will (and already have) recommend Decathlon and the Rockhopper 500.
Thank you Decathlon and keep up the good work.


It was only £165 from Decathlon, amazing value.



  (United Kingdom)

50-59 years old    Man

5 5

used for 1 week or less This is the best bike I've owned in a long time. I'm nearly 50 now and I just needed something to M.O.T. myself (lol), and this bike is good for that. I've also been admired a lot more by the ladies in my area while riding it around so I guess this bike is a bit of a cycling babe magnet too.
My wife will definitely need to buy one too or she's in danger of losing me to a cute lady rider, once I loose my gut of course:-).

Rock rider 500

Great mountain bike for the money

Puncture in rear tyre


  (United Kingdom)

50-59 years old    Man

5 5

used for 2 to 8 weeks Tyre was flat in the shop inflated by shop assistant but inner tube had to be replaced at home because of puncture

happy with the bike apart from

the whole bike is nice

stronger wheels


  (United Kingdom)

20-29 years old    Man

5 5

used for 2 to 8 weeks I am happy with the bike and I would advise anyone to but it apart from i have hit a log takeing it on a track and buckled the front wheel on the bike apart from that you get your moneys worth

Absolutely great bike,

great frame, wheels and service from decathlon

gear shifters (but not used to them yet)


  (United Kingdom)

20-29 years old    Man

5 5

used for 1 week or less Absolutely a great bike for the price. This was a replacement bike as my former one was stolen from outside my home. The service was absolutely great was told 20 minutes so had enough time to get the few accessories I needed for this bike. I've ridden it and it rides well, coping with fast gear changes, slow and fast corners and able to cope with slow controlled riding to avoid people. The gear changes are great they feel chunky and you can feel them work. The tyres are very grippy.
My only problem are the gear shifters as the up shifter is really far back on the brake/gear fitting. but overall great bike.
Hopefully its the same as you guys too

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.

Other Decathlon customers have bought

Don't forget!