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A reliable and high-performance cross country MTB.

All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
  • All Bikes Cycling - Rockrider 8.1 Mountain Bike, Grey DECATHLON - Bikes
Reference : 8168918
All Bikes

Rockrider 8.1 Mountain Bike, Grey

mountain bikers riding regularly on all kinds of terrain, looking for high performance. Reliable, high-performance XC aluminium MTB.

To view our full range visit our mountain bikes category.

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Home Delivery
available from £3.99.

Freedom of Return
find out more about our returns policy.

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Important: When you purchase a bike online, pedals are not fitted and the stem/bars are not adjusted. Please visit this video to see how to correctly set up your bike.

Life Time Warranty: B'TWIN makes the life time warranty for the frames, brackets, stems and rigid forks. Guaranteeing your Bike for life!

Product benefits

  1. 1
    Lifetime warrantyDouble-thickness 6061 T6 aluminium; racing geometry; 12.85kg in size M.
  2. 2
    Low weight / lightweightDouble-thickness 6061 T6 aluminium; racing geometry; 1.850 kg in size M.
  3. 3
    Accuracy / precisionSRAM X7/X5 27-speed drive train, Shimano Deore chainset.
  4. 4
    CushioningRock Shox Recon 100 mm hydraulic fork, handlebar lockout and bounce adjustment.
  5. 5
    Brake controlTEKTRO AURIGA COMP 160 mm hydraulic disc brakes
  6. 6
    Anatomic designSizes: S (155-165 cm) M (165-175 cm) L (175-185 cm) XL (185-200 cm)

Guarantee : Lifetime warranty for the frame, stem, handlebar and seat post on this bike. Details on btwin.com.


 

Product information

Size
S (1.55-1.65m) M (1.66-1.75m) L (1.76-1.85m) XL (1.86-2m)
Colours
Grey/Black
Wheel size
26 inches
Suspension
Front suspension fork

Technical Information

  • 1

    Frame Double-thickness 8 series competition 6061 T6 aluminium frame; racing geometry; 1.85 kg in size M. Lightweight and resistant. Its geometry offers an ideal combination for climbs and descents.
    Available in 5 sizes: S; M; L; XL

  • 2

    Fork New Rock Shox RECON Silver TK 100 mm fork Remote Lock-Out on handlebars. Effective rebound adjustment, can be locked in place with a half turn of the lever.

  • 3

    Suspension /

  • 4

    Drive train SRAM X7 front derailleur
    SRAM X7 rear derailleur; 9 speeds;
    Push pull SRAM X5 levers.
    Shimano Deore M590 22x32x44 crankset with
    SRAM PG950 11x32 9-speed cassette. Very reliable and efficient drive train, even in extreme conditions.

  • 5

    Brakes TEKTRO AURIGA COMP hydraulic disc brakes with 160 mm rotors. Powerful, progressive in any circumstance

  • 6

    Handlebar Comp 600/ 640mm raised handlebar, oversize diameter for greater durability. The position is higher to provide more control and comfort without affecting performance.

  • 7

    Stem Rockrider Comp stem, oversize diameter, for more durability.

  • 8

    Steering Aheadset headset by VP.

  • 9

    Saddle New Rockrider COMP saddle by Velo

  • 10

    Seatpost Rockrider COMP seat post

  • 11

    Wheels Rockrider Comp 32 hole rims by Rigida Hub JT D041/D142, 2 mm stainless steel spokes Sealed bearings.

  • 12

    Tyres New Michelin country trail tyre

your reviews
5.0
(12 reviews)

Dont be a brand snob

, The 08/04/2014

5 5
5.0

Excellant kit, well made, brilliant price point

Will need change a couple of components

I brought this bike after much research, everything said it was excellant value for money. I can absolutely confirm this!! I ride at Cannock Chase most weeks and have been to the Forrest of Dean several times, and it takes everything i throw at it. The kit on it is very good for a bike at this price point, and certainly up there with bikes costing a couple of hundred pounds more, though you may need to change some basic parts, firstly the saddle!! Dont be a brand snob, its really that goood

Great bike....

, The 19/03/2014

5 5
5.0

Light, good fork, superb brakes

Tyres a bit cheap

Having owned a Rockrider 5.3 previously, I was interested in buying another, however I decided to spend the extra on an 8.1, I'm glad I did, it's a major step up from the 5.3, lighter, the fork is smoother and less choppy and the brakes are awesome, it even comes with spd pedals. The tyres are a bit cheap and nasty, but easily changed, all in all a great bike.

Outstanding value

, The 14/03/2014

5 5
5.0

Great Spec, strong frame, lifetime warranty

wider bars, more comfortable seat

For the money you simply won't find a better bike. Had the bike a few weeks and it's handled anything yhrown at it. Forks work well and remote lockout is a great bonus. Sram drivetrain is reliable and precise. Only downside I've found is a wider bar is needed for bettet control and a more comfortable seat but these are personal choices. Highly recommend

great value

, The 14/02/2014

5 5
5.0

gearchanges, forks

brick seat!

Only got this bike a couple of days ago, a massive leap from my Apollo. This bike is a steal at the price, gearchanges are smooth and positive. Brakes are outstanding for this level. My best sporting buy. Shop staff were really helpful and patient

Excellent equipment levels for the price

, The 28/10/2013

5 5
5.0

Cost, equipment level, quality of finish

Tyres better suited to dry conditions

I am a committed road cyclist, used to high quality road and touring bikes. I wanted an MTB for the winter but couldn't justify a huge price. However, being used to quality road bikes meant I wanted something that would not frustrate me. I read various reviews of the RR 8.1 and saw one in Alencon, France. I finally bought one at the Edinburgh store. Equipment levels are only matched by competitors bikes £300 more, frame quality and finish are excellent and the bike was beautifully set up for me.

Information / Concept / Technology

Restricted use :

Not designed for: BMX, Dirt, descent, or free ride.

Stock advice

The b'Twin mountain bike should not be stored outdoors for long periods of time. It should be stored in a cool, dry place, away from corrosive products and salty air.

Care instructions:

Regularly lubricate your chain, regularly check your tyre pressure (recommended before every outing) and check (every 3 months) the state of your hoses as well as all of your screw and nut fittings.