Designed for Recreational mountain biking on paths and trails.

More details
SKU: S13214 (2004287)
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Delivery in 4 to 5 days

DKK 1,666.50
Characteristics Designed for Recreational mountain biking on paths and trails.
Product Benefits
  1. Cycling comfort
    Raised position. Ergofit ergonomic saddle. 80 mm front suspension.
  2. Efficiency
    Aluminium frame. Shimano 21 speeds. Wide rims and tyres for faster terrain.
  3. Precision
    Double V-brakes: light and powerful. Tyres with good lateral grip.
  4. Ease of use
    Ease of use
    Grip shifters. Integrated chainring and derailleur guards.
  5. Lifetime warranty
    Lifetime warranty
    B’Twin provides a lifetime warranty on the frame, stem and handlebar.
  • Size
    S / M / L
  • Wheel size
    26 inches
    14.85 kg in M without pedals
    frame, stem and handlebar
  • Suspension
    80 mm suspension fork
  • Colour
    Black / Blue / Fuchsia
Product feature
  1. Design
    The ROCKRIDER 340 was designed and created in France, at the B'Twin Village in Lille, by a team of experts and cycling enthusiasts dedicated to designing our mountain bike Sport Touring line. Production took place in different factories in Europe as close to our Decathlon stores as possible. More information available on our website:
  2. Frame
    Exclusive Rockrider 340 frame, with an upright position for multi-purpose use. Made from reinforced 6061-T4T6 aluminium that combines durability and low weight. "Sloped" unisex frame geometry is suitable for both men and women. Painted with 3 coats of paint and varnished designs for long-lasting protection.
  3. Front suspension
    Suntour XCT front suspension with 80 mm travel and stiffness adjustment dial. Equipped with a mechanical spring and elastomer stoppers for maximum reliability and minimum maintenance.
  4. Rear suspension
    No rear suspension.
  5. Drivetrain
    Triple-chainring steel chainset (22/32/42 teeth) with a plastic guard. Shimano Tourney TY500 7-speed rear derailleur. Shimano TZ30 or Microshift MS22 front derailleur. SRAM MRX21 speed grip shifters, with speed indicators. Shimano TZ21 cassette with 7 cogs, 14-28 teeth. KMC Z51 chain that's wider for more durability.
  6. Brakes
    V-brake front and rear brakes with a coil spring for more powerful braking. Aluminium mountain bike brake levers that require only 2 fingers to operate.
  7. Handlebar/stem/steering/grips
    Semi-raised mountain bike handlebar for added comfort while riding. 600 mm wide steel handlebar that combines comfort and stability. Aluminium stem, 90 mm (XS / S / M) or 110 mm (L / XL), with a 10° angle for maximum comfort. Aheadset-type headset for greater resistance to impacts and rigidity in turns. B'Twin Sport 100 grips have a soft-touch finish for better grip and extend the grip shifters.
  8. Wheels
    26" B'Twin Alloy Single Wall wheel. Wide wheel with 36 spokes for greater durability and shock resistance. Quick-release on the front wheel for easier maintenance, transport and storage. Lock nut on back wheel to reduce risk of theft.
  9. Tyres
    New B'Twin All Terrain Dry mountain bike 26" x 2.0 tyres known for their high performance (thanks to fast central tread) and good grip in the turns (thanks to side lugs).
  10. Saddle / seat post
    Exclusive B'Twin Ergofit saddle with a wider "hammock" shape that evenly distributes pressure, resulting in a more comfortable seat. Steel mountain bike seat post with a 29.8 mm diameter and 350 mm long.
  11. Pedals
    Bike comes with mountain bike platform pedals with bearings, made from hard resin for lower weight and greater safety (less aggressive in case of pedal that slips).
  12. Weight
    14.5 kg in size XS without pedals. 14.8 kg in size S without pedals. 14.85 kg in M without pedals. 15.0 kg in size L without pedals. 15.2 kg in size XL without pedals.
  13. Accessories
    Comes with a derailleur guard and chainring guard, bell, front and rear lights, and wheel and pedal reflectors. Frame compatible with a rear pannier rack, baby seat, stand, bottle cage, front and rear mudguards, saddle bag, etc.
  14. Accessories
    Comes with a derailleur and chainring guard, bell, front and rear lights, and reflectors on the wheels and pedals. Frame compatible with a rear pannier rack, baby seat, stand, bottle cage, front and rear mudguards, saddle bag, etc.
  15. Weight
    14.85 kg in size M without pedals.
Product testing
  1. Storage advice
    Store your bike in a dry, cool place. When used or stored in a salty environment, wash after each use.
  2. Cleaning advice
    Carry out regular maintenance on your fork (clean and grease dampers), especially in winter. Take your bike to your Decathlon store's After-Sales Service, which offers a free safety inspection on all new bikes purchased.
  3. Product restrictions
    Not designed for MTB riding on rough terrain.
  4. Product catchline
    Comfort and high performance: Lighter aluminium frame. Front suspension fork with adjustable damping.
  5. Lab tested
    We also recommend that beginners use cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.
Product reviews
4 / 5
21 reviews
21 users recommend this product
Write a review
  • Just starting back into cycling

    George (United Kingdom)
    Used for 1 week or less
    Already pretty much in love with this bike and the freedom it shall bring. Build quality is on par with my old gt agressor and its around £100 cheaper. The only things im planning on changing is switching to trigger break and gears rather then the current grip twists.

    So far so good.
  • Awesome!

    Karl (United Kingdom)
    Used for 1 week or less
    Bought for my godson, first adult bike and he loves it. Very impressed with the build quality and it rides really well. For the price you can't fault it.
    Build quality, spec, comfort
  • Rockrider 340 Mountain Bike - Blue

    dean (United Kingdom)
    Used for 2 to 8 weeks
    Good bike for the price , I purchased two for christmas presents and so far so good , the delivery and customer service where horrendous, Arrived 4 days after guaranteed delivery date, After several emails and telephone calls was given some bull about computers going down , Ok it was december but only the 02, It was like the left hand didn't know what the right hand was doing, It cost me a 1 days holiday and hours of emails and phone calls, When you work out the cost of a days holiday and all the aggro, I should have gone to where i got my bike (Mr, Ale Fords), Or take with you when you purchase at the store.
    Bike looks well built
    Delivery and customer services absolute rubbish,
  • Poor bike

    James (United Kingdom)
    Used for 3 to 6 months
    I have had my btwin rockrider 340 in lots as a teen I use it everyday after around 4 months the bike went massively downhill I have just had the pedals and gears replaced but still the gears don't work I cannot go into gear 3 I wish I had got the btwin 520 or 540 every time I have brought it in for repair the workers told me it's my fault now they have said they will not repair in any more even thought it's under 2 year warrinty.
    Response of the brand
    Hi James,

    Sorry to hear about the issues you've had with your bike. The bike is really designed for occassional use rather than daily use. However the gears should work still with 4 months of daily use. The issue you have described is more of an issue with set up rather than the bike itelf. I suggest you call into your local store to get them to readjust this for you.

    Rob Basnett b'Twin Product Expert DECATHLON
  • Death Trap

    Ben (United Kingdom)
    Used for 1 week or less
    bike turned up, the brakes weren't aligned, wheels weren't trues. poorly set up. First ride out on this bike. Within 10 seconds in 1st gear the chain slipped off. Tried again, got some speed, moved up to second gear, chain slipped off (no chain crossing). Pedalled back down to 1st gear, chain slipped off. Crusing for 10 minutes and moved to go up a gear, chain slipped off and caught underneath the ddisc stopping muy bike. Both me and the bike went flying, i've got a couple of bumps, slammed my back against a curb and the bike was a little scuffed up. On my way to A & E now.
    The look of the bike
    Poorly Built, Dodgy Gears
    Response of the brand
    Dera Sir,
    I have just contacted you directly about this bike.
    I'm sorry to read that you came off your bike. I hope you are OK.
    Peter Lazarus UK Cycling Market Manager DECATHLON
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