Rockrider 520 MTB Cycle Blue

8359146

BTWIN

Made for The 27.5" MTB. Designed around the 650b format, this b'Twin Evo alloy frame delivers great performance at a good price.
Hayes MX5 disc brakes, full SRAM 24 speed groupset, double walled aero 650b wheels and adjustable Suntour XCT forks lets you glide over rough terrain and stop with ease in all weather conditions.
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Advantage
Cycling comfortRaised position. Ergonomic saddle. Height-adjustable stem.Soft-touch grips.
EfficiencyCGF Evo aluminium frame. 24-speed SRAM X3. Light, 27.5" Aero Trail Evo wheels.
PrecisionDouble disc brakes. Easy-to-handle geometry. Tyres have good grip in turns.
Ease of useFork and tyres can be easily adjusted to the rider's weight.
Lifetime warrantyB’Twin provides a lifetime warranty on the frame, stem and handlebar.
Warranty2 Years
Technical Information

1
WHEEL SIZE
27.5 inches
2
WEIGHT
14.7 kg in M without pedals
3
LIFE WARRANTY
Frame, stem and handlebar.
4
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.
5
FORK
B'Twin U-Fit 80 fork, with 80 mm of travel and an innovative fork stiffness adjustment based on the rider's weight (55 to 105 kg). Durable thanks to the materials and fabrication processes used.ORSuntour XCT 80 fork with 80 mm of travel and adjustable fork stiffness (more/less).
6
SUSPENSION
No rear suspension.
7
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.
8
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.
9
HANDLEBAR
B'Twin Sport handlebar in aluminium for less weight. 660 mm. Oversize diameter for added stiffness.
10
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.
11
STEERING
Semi-integrated Aheadset offers improved watertightness, more precise steering, and an integrated look. B'Twin Sport handles with grooves, 120 mm long: genuine comfort while riding.
12
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.
13
SEAT POST
B'Twin Sport seat post in aluminium for less 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 broad adjustment range.
14
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.
15
TYRES
Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tyres with a central tread specially designed for fast performance. Side lugs provide traction in the turns. Also includes a chart showing recommended pressure levels depending on the rider's weight.
16
PEDALS
B'Twin Flat platform resin pedals.
17
COMPOSITION
Frame : 100.0% Aluminium 6061
18
STOCK ADVICE
Store in a cool, dry place, away from corrosive products and salty air.
19
GUARANTEE
Frame, handlebar and stem have a lifetime warranty. 2-year warranty for parts (excl. wearing parts)
20
DISCLAIMER
1) The components seen on the bicycle in the videos may change from the actual product. 2) The bicycle will be delivered in 85% assembled condition. The directions for the cycle assembly will be sent via mail ( if you have subscribed). The tools for assembly are provided with the cycle only for online buyers. 3) The 3-month, free check up is valid only if the user is able to take the bicycle to a decathlon workshop.4) All bicycle accessories need to be purchased separately.
21
SERVICES
If you will need a spare part to be replaced, we have it all at our workshop. You will have to drop by our workshop to get your cycle serviced.
Information / Concept / Technology
Stockage tips
Please store the bike with the tyre inflated and away from weathering agents like rain and Sun.

Accessories

Reviews

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Awesome Bike
Used for 3 to 6 months
This is a very well designed , great performance Bike.
Everything is very nicely and thoughtfully designed . This bike performs beautifully on hill ride and on planes . It has all the gears ratio to match any kind of terrain. A Great performer and full value for money
B'twin RR520 Rocks....!!!
Used for 3 to 6 months
Bought this bike at the middle of September 2016, done about 200+ kilometres so far both off road and on road but primarily on road. On road its very good for urban movement with easy shifting, braking and very manouverable . Front sifter is slightly stiff when going 1st to 2nd however this could just be my fault or this particular bike. Bike colour BLUE is very nice and is clearly visible when in urban or rural areas. When off road the bike performs admirably with good braking and traction in both dry and wet conditions. All round it is a Outstanding Sports MTB bike...
rockrider 520
Used for 7 to 12 months
There is problem with tube valve ,air bubbles is coming when keep water
it is good and comfort for riding,i like it
back weel air presseure is gradually decreasing
Best deal
Used for 3 to 6 months
It is the most comfottable cycle of this budget
Suspension,tires
Gear shift
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