Shop sports shoes, sports gear & sports equipment
Home Delivery from £1*. Free Click & Collect
errorSearchInfoBulle messageErrorEmptySearchZone
  • DecathlonCompletionCategoriesTitle
  • DecathlonCompletionTopSearchesTitle

Hydraulic disc brakes: Greater efficiency

All Bikes Cycling - Rockrider 520 Mountain Bike B'TWIN - Bikes
All Bikes

B'TWIN Rockrider 520 Mountain Bike

The Rockrider 520 hardtail MTB from b'Twin is a fantastic value for money mountain bike. With it's lifetime warranty 6061 alloy frame and excellent spec it really is built to last and will always put a smile on your face. The XCR lockout forks and Tektro AURIGA Comp 160 mm hydraulic disc brakes will keep you in control and added to the Shimano Acera 27 speed gears you can be confident that many miles of mountain biking on the trails will be fully rewarded. To view our full range visit our mountain bikes category.


Please select a size

Please select a size


until £330.00 -24 %

From £250.00**

DecathlonDeeeTaxMentionAfterPrice /

Price in store £330.00 £250.00 **

Reserve in store

From 24/12/2015 To

** From 23/12/2015 To

* Sales from to Until end of stock
** Sales from 23/12/2015 to Until end of stock

From and limited stock

* Sales price at

From and limited stock

* Sales price at

* From 24/12/2015 and limited stock
** From 23/12/2015 and limited stock
Add to my wish list
Product already added
Free delivery with Click & Collect
From : 08/02/2016 with this item
Reference : 8293188

Delivery Info: When buying a bike online, pedals are not fitted and the stem/bars are not adjusted. View this video to see how to correctly set up your bike at home.

Our customers pictures

Product benefits

    • Cycling comfort
    • Raised position. Lamellar grips.Covered saddle. 100 mm fork.
    • Efficiency
    • Double, hydraulic disc brakes. Forks with lockout feature. 27-speed SHIMANO.
    • Ease of use
    • Lock your fork by hand in an instant.
    • Lifetime warranty
    • B’TWIN guarantees the frame, stem and handlebars for life.
    • Precision
    • HUTCHINSON Python tyres: A golden standard in grip and performance.
  1. Guarantee : Frame, handlebars and stem have a lifetime warranty. 2-year warranty for parts (excl. wearing parts)

Product information

S:150-165; M: 165-175; L:175-180; XL:180-195
Black / White / Red
Wheel size
26 inches
Suspension fork
13.4 kg in S without pedals

your reviews

4.2 / 5

42 reviews

36 people recommend this product

Write a review
Sort by :

Rockrider 520


  (United Kingdom)


5 5

This bike is excellent value for money when you consider what you get for the price.
I have put down quite a few miles and have not encountered any problems. The gear changes are silky smooth, the brakes are spot on and the overall appearance is very pleasing.
I am very impressed with the way it performs and would not hesitate to recommend this bike to others.

Excellent value bike.

Comfortable bike with good handling.

Box poorly designed. Requires 2 people to move.


  (United Kingdom)

+60 years old    Man

4 5

used for 2 to 8 weeks This is a good bike for the price. Reasonably easy to set up. You need to reposition brake and gear levers to enable the bars to be reduced by 35mm on each side. No instructions provided to pretension the front forks. Despite these criticisms, I have the same bike in Spain so it is still a good bike once modified.

Rockrider 520

Price, look



  (United Kingdom)

40-49 years old    Man

4 5

used for 1 week or less just bought this bike, lovely ride and look. The front gear changer catches the pedal though when on the largest cog and the gears slip and lock when under pressure going up hill, minor issues that can be adjusted I guess in store

520 Rockrider...all good...except for gear shifts

Handling and the finish

gear shifting



20-29 years old    Man

2 5

used for 1 week or less Hello,
I purchased the 520 Rockrider a week ago....Delivery was on time....the cycle came in a mint condition....all good.. ..the only problem was in the gears....the chains squeaks and sometimes the gears does not shift well...specially during uphill....its makes a crack sound and peddles jerk.....
I bought this from Noida,India

Response of the brand

Hello Mohit,
Thank you for taking the time to give us your feedback. 
The rockrider 520 is indeed a good bike with a nice matte finish paint job.
The problem of the shifting can be resolved. The drive train needs some fine tuning so that the shifting is spot on. This is done at any decathlon store at the workshop section. Please let me know if the bicycle was bought from Decathlon Noida store or any other channel at Noida. If it is from our store, I will inform the store about your situation whenever you visit and we can resolve the problem.

Deepak Babu E-sport manager DECATHLON

Non availability of spares

They don't keep spares , wait for a week or two



40-49 years old    Man

1 5

used for 3 to 6 months Btwin is a good cycle , but been sold through a wrong channel , the service and response is too poor , spares availability is low and may take a one to two weeks to arrange spares , the commitment level is extremely poor

Response of the brand

Hello Rajeev,
Thank you for taking the time to give us your feedback. We are sorry for the bad experiences you have had with our spares availability.  Please let me know which spare is that you are looking for. We can arrange it for you. The only instance when  it takes time for us to get the spare part is when we try to ship it from an other state.  Other wise all spares for btwin bikes are available at our store.
Deepak Babu E-sport manager DECATHLON

Rajeev did not find this review helpful

Technical Information

  • 1

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

  • 2

    Fork Rockrider XCR 100 mm lockout fork by SR Suntour.
    Lightweight and durable hydraulic fork cartridge. Preload adjuster and lockout.
    100 mm travel.
    Magnesium fork blades.

    The damper finish ensures long-lifetime.

  • 3

    Suspension No rear suspension.

  • 4

    Drive train MIRANDA BETA BLACK aluminium 22x32x42 crankset;
    Shimano X50 or Microshift M30 front derailleur;
    Shimano ACERA rear derailleur;
    Shimano ACERA 9-speed shifters;
    SRAM PC951 chain;
    PG950 9-speed cassette 11 X 32.

  • 5

    Brakes AURIGA Comp 160 mm, hydraulic disc brakes at the front and rear for greater braking power and precision, even in extreme conditions (e.g. mud).

  • 6

    Handlebars Rockrider SPORT handlebars with oversized diameter: oversized diameter for greater stiffness and more accurate steering.
    Width from 600 mm (S) to 640 mm (M, L and XL).

  • 7

    Stem Oversized Rockrider SPORT stem (oversized diameter), with a 6° rise. Length: 90 mm (S), 100 mm (M) and 110 mm (L and XL).

  • 8

    Steering Aheadset Rockrider SPORT headset, 1⅛".

  • 9

    Saddle Rockrider SPORT LIGHT saddle.

  • 10

    Seat post Rockrider SPORT seat post: diameter 29.8 mm, length 350 mm.

  • 11

    Wheels RIGIDA SPHINX 32-hole, double-walled rims.
    Watertight Formula DC19/DC22 disk ready hubs,
    2 mm diameter stainless steel spokes: impact and corrosion-resistant.

  • 12

    Tyres Hutchinson Python tyres with versatile profile: a market benchmark.

  • 13

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

  • 14

    Accessories Possibility to add accessories (bottle cage, mudguards, bag under the saddle, pannier rack at the rear, etc.).

  • 15

    Weight 13.4 kg in size S without pedals.

  • 16

    Electric 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!