Rockrider 340 Mountain Bike - Grey



Made for

Occasional mountain bike sport touring.
The first true touring mountain bike: comfortable thanks to a more upright seating position and front suspension, efficient thanks to a lightweight aluminium frame and Shimano 21 speeds.

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Cycling comfortRaised position. Ergofit ergonomic saddle. 80 mm front suspension.
EfficiencyAluminium frame. 21-speed Shimano.Wide rims, tyres suited to faster terrain.
PrecisionDouble V-brakes: powerful and lightweight. Tyres have good lateral grip.
Ease of useGrip shifters. Built-in chainring and derailleur guard.
Lifetime warrantyB'Twin offers a lifetime warranty on the frame, stem and handlebar.
WarrantyFrame, handlebar and stem have a lifetime warranty. 2-year warranty for parts (excl. wearing parts)
Technical Information

Exclusive Rockrider 340 frame with a raised steering 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.
Suntour XCT fork with 80 mm of travel and a stiffness adjustment dial.
No rear suspension.
Triple-chainring steel chainset (22/32/42 teeth) with a plastic guard. Shimano TY21 7-speed rear derailleur. Shimano TZ30 or Microshift MS22 front derailleur. SRAM MRX21 grip shifters with speed indicators. Shimano TZ21 cassette with 7 cogs, 14-28 teeth. KMC Z51 chain, wide for greater durability.
Front and rear V-brake system with a helical spring for more powerful braking. Aluminium MTB brake levers that require only 2 fingers to operate.
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 300 grips have a soft-touch finish for better grip and to extend the grip shifters.
Exclusive B'Twin Ergofit saddle with a wider "hammock" shape that evenly distributes pressure, resulting in a more comfortable seat. Or B'Twin Sport 100 saddle with high density foam for added comfort.
Seat post
Steel MTB seat post with a 29.8 mm diameter and 350 mm long.
B'Twin Alloy Single Wall 26" wheel with single-walled rims. Wide for longer-lasting durability. 36 spokes for greater resistance to impact. Quick-release on the front wheel for easier maintenance, transport and storage. Lock nut on back wheel to reduce risk of theft.
New B'Twin All Terrain Dry Mountain Bike 26" x 2.0 tyres known for their high performance (thanks to a faster central section) and good grip in the turns (thanks to the side lugs).
Flat mountain bike pedals with bearings, made from hard resin for less weight and added safety (less aggressive in the event of a slippery pedal).
14.85 kg in size M without pedals.
SizeXS / S / M / L / XL

Wheel Size26 inches

Weight14.85 kg in M without pedals

Life warrantyframe, stem and handlebar.

Suspension80 mm suspension fork

ColourGrey / Blue
Information / Concept / Technology
Frame : 100.0% Aluminium

Product test
We recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.

Stockage tips and Disclaimer
Store in a cool, dry place, away from corrosive products and salty air.
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 given in the box and also 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 cycle check up is valid if the user is able to take the bicycle to a decathlon workshop.
4) 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.

Maintenance tips
Regularly maintain 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.
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Buy at your own risk
Let me give you a quick review on this. I bought this bike on June 29th, 2016. This it was my biggest mistake. This bike is for turning you into a hater. Firstly this bike is not at all confortable, it will give you a sever back pain. The seat is so small that it will effect your hip bones. The handle bar will cause wrist pain. Last but not the least, gears will make you feel like you are riding a defective bike. shimano gears are the known to be the best in the world, but in this bike I guess they installed shimano's most cheapest derailleurs.
Please don't waste your money in this bike. Go for the better one. Don't fall for it's looks.
Response of the brand

Hello Sanket, 

Thank you for taking the time to give us your review. Apologies for the bad experience you have had with the bike. I would like to know if you are a beginner cyclist and how much distance you would ride in a day. These factors are important in choosing a bike. In a Leisure MTB like the rockrider 340 the frame is of a sport geometry. Which means you back will be angled towards the handle bar and the seat will be small.  The Bike is designed for rugged conditions so it will perform well on our roads. If you are riding everyday and comfort is the important thing for you to look at, you will need a city hybrid bike. ( . It has wider seats with gel and an adjustable handle bar for better positioning.   

The derailleur on the rockrider 340 was the TZ-30 which is a very basic derailleur of Shimano. We received negative feedback from our users and now it's  upgraded it to Shimano Tourney. Since this change, the feedbaack has improved. It is possible that the tuning is off on your bike and our workshop will be able to fix that when you bring it for you first free check up.

Deepak Babu E-sport manager DECATHLON
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