Rockrider 340 Mountain Bike - Yellow



Made for

Adults who are looking for city commute, occasional mountain bike and sport touring. Front suspensions give you added comfort.
The first true touring mountain bike: comfortable thanks to a more upright seating position and front suspension. A lightweight aluminium frame and Shimano tourney 21 speeds.

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Cycling comfortRaised position. Ergofit ergonomic saddle. Innovative front suspension, 80 mm.
EfficiencyAluminium frame. 21-speed Shimano.Wide rims, tyres suited to faster terrain.
PrecisionDual V-brakes: powerful and lightweight. Tyres have good lateral grip.
Ease of useInnovative fork adjustment system based on rider's weight. Grip speed shifters.
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. Reinforced 6061-T4T6 aluminium that combines durability and light weight. "Sloped" unisex frame geometry is suitable for both men and women. Three layers of paint and varnished decorations provide lasting protection.
B'Twin U-Fit 80 fork, with 80 mm of travel: Innovative fork stiffness adjustment based on rider's weight (55 to 105 kg). Durable thanks to the materials and fabrication processes used. Mechanical spring with an elastomer stopper for maximum reliability and minimum maintenance.
No rear suspension. 80 mm front 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 braking 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.
Seat post
Steel mountain bike seat post with a 29.8 mm diameter and 350 mm long.
B'Twin Alloy Single Wall 26" wheel. Wider for greater durability. 36 spokes for greater resistance to impact. Quick-release on the front wheel to make it easier to maintain, transport and store. Lock nut ( no quick release) on the back to reduce the risk of theft.
New Ralson Mountain Bike 26" x 1.95 tyres. High-performance tyres with buttons best suited for on road and short trails.
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.
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.
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.
SizeS / M / L

Wheel Size26 inches

Weight14.5 kg

Life warrantyframe, stem and handlebar

Suspension80 mm suspension fork

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
Store in a cool, dry place, away from corrosive products and salty air.

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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Excellent bike... happy about my choice
Used for 7 to 12 months
Enjoying riding this bike.. Me and my son uses it regularly.... comfortable and smooth ride...! One suggestion.. the self maintaining tips need to be provided.. i am staying away from Decathlon store.. the lubricating oil is not avilable online / at stores.. since long time.. Pls. help
Front Gear shifter doesn't work
Used for 1 week or less
I bought this b twin bike thinking as a quality product like many others at Decathlon. Well I was entirely wrong. The first day I noticed when I try shifting from 2nd to 3rd speed of front... It's a matter of chance and at times one might end up the chain out thrown. Decathlon Rohini guys submitted it and there happened nothing for 9 days. I called up and next day they said it's ready with problem fixed. I sent my driver and the problem was still with a funny justification that this much of nuisance is normal and quite a character of the component installed into it. And, he added, I will have to go with it. Now, what was the point to retaining the bike for 10days if it was normal and was exhibited the problems it was supposed to!
Just because they are unable or unwilling to fix, they are making excuses like this. I wrote it here, however I am quite hopeless about the steps Decathlon managers will take!
Oh yes, one star bkoz you guys don't give option less than that. Congratulations!
Response of the brand
Hello Vijay, 

Thank you for taking the time to give us your review. We are sorry for the unpleasant experience. The shifting, specifically of the front shifter can be tuned by the technician to give a perfect shift.  I will get in touch with Decathlon Rohini to find out why the problem of shifting is persisting. The Rohini store will get in touch with you to provide a solution.  We will replace the component completely if the Rohini store is convinced that it is the only solution.

Apologies, again from our side. 

Great bike.
Used for 1 week or less
Been using it for some time. It's good. Ride it before choosing the right size.
Tire frame got bent
Used for 1 week or less
It was the first ride of bike and rode it for 100 kms uphills and when i came back home i noticed there was a bend in back tire frame .. may be its too sensitive
Response of the brand
Hello Amanpreet,

Thank you for taking the time to give us your review. Apologies, for the bad experience you have had with the Rockrider 340.  The Rockrider 340 is a leisure MTB and it will not be able to take a complete off-road terrain like a complete MTB (eg: Rockrider 520/ Rockrider 540). But it should be able to handle matted uphills and small trails. Depending on the terrain the wheels can get bent at certain times because of the change in tensions on the spokes. The wheel can be retuned and does not need replacement. 
Please take the bike to the closest Decathlon store and explain the situation to the workshop. The bend can be removed by tuning the spokes. 

Nice of the Price
Used for 2 to 8 weeks
The cycle is very good. And really recommend for very one. Nice suspension and good grears.
The negative part is it take a while to speed up..but when it speeds up its really cool..
If you want a nice cycle at this price go for it
The gear shifting is a problem
Very good quality product by bTwin.......
Used for 2 to 8 weeks
There are some accessories which are not compatible like the carrier, and the usual front mudguard. Also the front mudguard is too high and hence all the mud will fall on you!!On an overall, it is very good. Go ahead and buy it.
Front suspension and gear system
some accessories are not compatible......
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