Rockrider 520 Mountain Bike

€ 310.80

Designed for MTB touring.

More details
SKU: S120236 (1864810)
Select a color:
    Select a size :
Size Guide

Delivery in 6 to 7 days

Our e-commerce is suspended for a transition period. We expect to be back soon!
Product benefits
  1. Cycling comfort
    Raised position. Ergonomic saddle. Height-adjustable stem.Soft-touch grips.
  2. Efficiency
    CGF Evo aluminium frame. 24-speed SRAM X3. Light 27.5" Aero Trail Evo wheels.
  3. Precision
    Double disc brakes. Easy-to-handle geometry. Tyres have good grip in turns.
  4. Ease of use
    Ease of use
    Fork and tyres can be easily adjusted to the rider's weight.
  5. Lifetime warranty
    Lifetime warranty
    B’Twin provides a lifetime warranty on the frame, stem and handlebar.
  • Size
    M / L
    27.5 inches
  • Weight
    15.2 kg in M without pedals
  • Life warranty
    frame, handlebar, stem.
    80 mm suspension fork
    Grey / Yellow / Blue
Product feature
  1. Frame
    Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminium frame for 27.5" wheels. Comfortable seating position thanks to raised steering. Seat is 5 times more flexible than a standard frame thanks to a narrow 27.2 mm seat post. Low bottom bracket: helps keep the mountain bike stable in turns, and makes it easier to place foot on the ground. Open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheel base: bike is easy to turn.
  2. Fork
    Suntour XCT 80 fork with 80 mm travel and adjustable fork stiffness (+ / -).
  3. Suspension
    No rear suspension.
  4. Drivetrain
    SRAM S200 triple-chainring chainset (22/32/42 teeth). SRAM X3 8-speed rear derailleur. Microshift MS22 front derailleur. SRAM X4 shifters with speed indicators. SRAM PG820 cassette, 8 cogs, 11 to 32 teeth.
  5. Brakes
    Tektro aluminium brake levers: lightweight and precise. Front and rear Hayes MX5 mechanical disc brake callipers: powerful, progressive braking, even in rainy and muddy conditions.
  6. Handlebar
    B'Twin Sport handlebar made from aluminium for reduced weight. Available in 660 mm (size M) and 680 mm (size L): wider for extra stability. Oversize diameter for more stiffness.
  7. Stem
    Exclusive B'Twin Upside Down 0/30 aluminium stem (lower weight). Lengths: 70 mm (S), 80 mm (M and L), 90 mm (XL): shorter for more precise steering. Can be raised by up to 3 cm with 5 settings (+ 0 mm, + 7.5 mm, + 15 mm, + 22.5 mm and + 30 mm). Is 15% stiffer thanks to its width being increased by 48%, providing more precise steering.
  8. Steering
    Semi-integrated Aheadset offers improved watertightness, more precise steering, and an integrated look. B'Twin Sport 120 mm grips with grooves: genuine comfort while riding.
  9. Saddle
    Exclusive B'Twin Ergofit Evo saddle offers outstanding comfort thanks to its wider "hammock" shape and good distribution of pressure points regardless of the rider's pelvis width.
  10. Seat post
    B'Twin Sport seat post made from aluminium to reduce weight. 27.2 mm diameter provides the seat with a natural flex that's 5 times greater than a classic seat post. 400 mm long, offering a wide adjustment range.
  11. Wheels
    Aero Trail Evo wheels with double-walled rims: lightweight, stiff, and durable. 27.5" diameter: the best balance of comfort and performance. Designed with 28 spokes to reduce weight while still guaranteeing rigidity and strength.
  12. Tyres
    Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tyres with a central tread optimised for good performance. Side lugs ensure good traction in turns. Comes with a table of recommended pressure settings depending on the user's weight.
  13. Pedals
    B'Twin Flat resin pedals.
  14. Accessories
    Mountain bike sold with a water bottle, bottle cage, hand pump, saddle bag, an extra inner tube and 3 tyre levers. This mountain bike can also be fitted with a pannier rack, mudguard, stand, etc.
  15. Weight
    15.2 kg in size M without pedals, including accessories.
  16. Accessories
    Your RR520 mountain bike comes with a bell, lighting, wheel reflectors, and pedals. The frame is compatible with: - front and rear mudguards, - stand, - bottle cage, - saddle bag, - rear pannier rack, - child seat (add an additional pannier rack for sizes S and M to avoid touching the rear wheel) etc.
    Tip No.1 When mountain biking, there is always the risk of a fall: don't forget to wear a helmet. Tip No.2 Even if the saddle is comfortable, cycling shorts with a pad (saddle-shaped foam) are a real plus for preventing glute pain. Tip No.3 If you don't want to stop to drink, bring water in a bottle or water bladder to access it while riding. Tip No.4 Punctures are always possible, remember to bring a repair kit.
Product testing
  1. Composition
    Frame : 100.0% Aluminium 6061
  2. Approved by
    The Mission Test test users in the Lyon mountains, in May 2015.
  3. Storage advice
    Store in a cool, dry place, away from corrosive products and salty air.
  4. Product restrictions
    Not suitable for All Mountain, Enduro, and BMX.
  5. Product catchline
    The Rockrider 520 equipped with 6 accessories essential to mountain biking; what you need to stay hydrated and perform minor repairs.
  6. Lab tested
    We recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.
Product reviews
4.2 / 5
145 reviews
145 users recommend this product
Write a review
  • Rock rider 520

    Paul (United Kingdom)
    Used for 1 week or less
    Good sturdy bike with great features normally not found on entry level.
  • Cracking Bike Great value for money

    STEPHEN (United Kingdom)
    Used for 1 week or less
    What a great bike this is spec is excellent value for money looks great
    Staff on the store were very knowledgeable and helpful made it a pleasure to buy from them
  • Rock rider 520 27.5”

    keiran (United Kingdom)
    Used for 2 to 8 weeks
    Bike feels really good on and off road, it’s light enough to manoeuvre easily and comfortable on long rides. However gears at present are a little temperamental keeps missing cogs and jumps out of gear when under strain uphills
  • Rockrider 520 mountainted bike

    John (United Kingdom)
    Used for 1 week or less
    How disappointing the first time I took the bike out the chain came off when changing from middle cogs to large at the front now left with 16 gears until I can get it to a bike shop and get the gears set up properly. With a 150 mile round trip it's not feasible for me to take it back to get the gears adjusted. Maybe i would have been better off going to a local well known bike shop where I could have got a similar bike cheaper and been able to take it back if there was a problem.
    Response of the brand
    Dear sir,
    Thank you for taking the time to inform us of the issue your have with the shifting on your bike. Could you kindly reply to me with the name of the store which set the bike up for you?
    Peter Lazarus, National Cycling Manager, DECATHLON
  • Great starter bike

    Nicholas (United Kingdom)
    Used for 2 to 8 weeks
    I bought this bike for my daughter to get into mountain biking and I have ridden it a few times myself, obviously there are budget components fitted but the overall look of the bike is excellent. The ride of the bike is very good and the frame is quite lightweight. Superb quality for the price.
  1. 1
  2. 2
  3. ...
  4. 28
  5. 29