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27.5" wheels, double disc brakes, 24 speeds.

  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
  • 15 - Cycling Cycling - ST 520 Mountain Bike, Black - 27.5
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15 - Cycling

ROCKRIDER ST 520 Mountain Bike, Black - 27.5"

ROCKRIDER
4.2/5
Built around the 650b format, this exclusive b'Twin Evo alloy frame delivers great performance at an exceptional price - we recommend it for riders looking for their first proper 27.5" hardtail mountain bike. The specific geometry and sizing is both comfortable and dynamic, while the Hayes MX5 disc brakes, full SRAM 24 speed groupset, double walled aero 27.5" wheels and rebound adjustable 80mm forks lets you glide over rough terrain and stop with ease in all weather conditions. This bike is available in all Decathlon stores in a wide variety of sizes.
  • Hayes MX5 disc brakes
  • Rebound adjustable 80mm forks for bumpy off-road adventures
  • Great in all weather
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PRODUCT BENEFITS

Cycling comfort Enjoy the raised position, adjustable stem, 80mm suspension, and hammock saddle.
Efficiency Ride and explore with the 27.5" wheels, 24 speeds, and aluminium frame.
Precision Control your path with the double disc brakes and notched tyres.
Ease of use Use the wheel to adjust the stiffness of the fork based on your weight.
Lifetime warranty Rockrider provides a lifetime warranty on the frame, stem and handlebar.

TECHNICAL INFORMATION

THE STORY OF THE ROCKRIDER 520 MOUNTAIN BIKE...

Entirely designed and developed in France at the B'Twin Village (Lille), this mountain bike is the fruit of the work of an expert team of passionate mountain bikers. The Rockrider team designed and tested the Rockrider 520 mountain bike with their test riders.

A UNISEX MOUNTAIN BIKE

Men's or women's mountain bike?
The Rockrider 520 mountain bike is unisex.
For greater comfort, the women on our mountain bike team recommend replacing the saddle with the Women's 500 Sport saddle, which is adapted to women's bodies.

HOW DO I CHOOSE MY MTB SIZE?

Several sizes available:
S: between 1.50m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85 m and 2.00 m
If you are on the limit between 2 sizes:
Choose the smaller size for easier steering (easier to handle) and comfort (straighter back).
Choose the larger size for easier pedalling with a more stretched-out position (position more suited to performance).

A FRAME THAT COMBINES THE JOY OF THE RIDE & THE PLEASURE OF STEERING

For a lighter weight and more efficient pedalling, the Rockrider 520 frame has been designed with 6061 aluminium (only 1.9 kg in size M). The lower bottom bracket helps keep you more stable during turns.

FRONT SUSPENSION TO CUSHION UNPREDICTABLE TERRAIN

Calmly face new obstacles (roots, pebbles, stones, etc.) with the front fork with 80 mm of travel.
Easy: use the wheel to adjust the stiffness of the fork based on your weight.

REAR SUSPENSION: NONE

This mountain bike has no rear suspension. This is a "semi-rigid" mountain bike.
Compared to a full suspension mountain bike (with rear suspension), the advantages are clear: lighter weight, you will spend less energy on flat ground. However, if you want more comfort, the RR 520 also exists in a "full suspension" version with a rear shock absorber.

DERAILLEUR & DRIVE TRAIN: REACH GREAT SPEEDS

3 8-speed chainwheels, or a wide range of 24 speeds.
2 quick shifters on the handlebar.
Left (chainrings): control ascents/descents.
Right (speeds): more precise control over your pedalling.
In detail:
- Triple chainwheels - 22, 32 and 42 teeth
- MICROSHIFT MS22 front derailleur
- SRAM X3 rear derailleur
- SRAM X4 shifters, with speed indicators
- SRAM PG820 8 cog cassette, 11 to 32 teeth

SADDLE / SEAT POST: COMFORTABLE AND SPORTY SEAT

Since your mountain bike rides will get longer and longer, it is important to have a suitable seat. So our teams have designed the exclusive B'Twin Ergofit Evo saddle. Suitable for all hip sizes, its "hammock" shape is particularly noticeable during sport touring. Along with the 27.2 mm diameter aluminium FLEX seat post, it guarantees greater comfort.
Easily adjust the seat height using the quick release on the seat clamp.

DOUBLE DISC BRAKES: GET A GRIP ON YOUR BRAKING

No matter what conditions you ride in (dry/wet/mud), the HAYES MX5 front and rear mechanical disc brake calipers offer powerful, progressive braking.
The TEKTRO aluminium brake levers are easy to grip, lightweight, and precise.

DOUBLE-WALLED 27.5" WHEELS

Have fun with the 27.5" double-walled aluminium Aero Trail Evo wheels. Their diameter is the perfect balance between comfort and performance. With their 28 spokes, they are lightweight, stiff, and durable.

TYRES FOR DRY TERRAIN

The exclusive 27.5" x 2.0 B'TWIN ALL TERRAIN DRY tyres are adapted to dry ground. Their side lugs provide good traction during turns. The central tread provides good performance and the side lugs offer traction during turns.
Recommendations for pressure based on the cyclist's weight are marked on the sidewalls.

PLATFORM PEDALS

The RR 520 comes with MTB bearing-mounted platform pedals made of hard resin for light weight and safety.
If your foot slips off the pedal, there's less risk of injury.

Weight

14.35 kg in S without pedals.
14.45 kg in M without pedals.
14.55 kg in L without pedals.
14.70 kg in XL without pedals.
The weight can vary based on the tolerance of the components. The bike comes with B'Twin platform pedals.
The total weight (bike + rider) should not exceed 120 kg.

Accessoires

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.

OUR ADVICE FOR YOUR FIRST RIDE

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.

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COMPOSITION / ADVICE

Composition
Frame (for bike)
100.00% Aluminium 6061
Stock advice Store in a cool, dry place, away from corrosive products and salty air.
Restricted use : Not suitable for All Mountain, Enduro, BMX

OUR COMMITMENTS

The Mission Test took place in the Lyon mountains, in May 2015.
Test Product We also recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.
Guarantee : Lifetime (frame, stem, handlebars). Availability of spare parts: 2 years.
 
 

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