₹ 15,999


₹ 13,999


MRP : ₹ 17,999

Made In : India

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.
Sizes guide


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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.OrB'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 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 95% assembled condition(Handlebar and pedals have to be assembled). The directions for the cycle assembly will be sent via mail ( if you have subscribed) and available on the product pages. The tools for assembly are provided with the cycle only for online buyers.
1) 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. 2)The 3-month, free checkup is valid only if the user is able to take the bicycle to a decathlon workshop. 3) All bicycle accessories need to be purchased separately.
SizeXS / S / M / L / XL

Wheel Size26 inches

Weight14.85 kg

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
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 cycle
Used for More than 2 years
Good for offloading and urban rides, requires low mantainence
Rockrider 340
Used for 1 week or less
Rockrider 340 Not a comfortable bike; suspension is not very active; gears are not easy to handle; handle is small for riding leading to shoulder pains. changed to Rockrider 520.
BTWIN Rockrider 340
Used for 1 week or less
I bought this bicycle from Decathlon Guwahati. I have been using this for 1 week and so far the overall impression is nice. However, there are some issues regarding the comfort of the seat and gear shifting. When I am trying to shift from 2nd to 3rd on my left gear shifter, the chain started creating sound and I lost my smooth riding experience. I reckon maybe this issue is because of lack of my practice in gear shifting. I hope that as I continue riding, these problems are going to be solved. The design and geometry of the bicycle are simple but eye catching. The colors are attractive too! Addition of a front disk brake would have been a good option under this price tag. Cheers!
Response of the brand
Dear Rudra, 
Thank you for taking time out to review this product. To improve the comfort level while riding the bike we recommend you get a basic cycling fit and also use a padded cycling shorts. For the issue with the front gear, we advise you to visit the closest Decathlon store for the workshop technical staff to diagnose the problem and provide a solution. Happy Cycling!    

Bad Bike derailleurs
Used for More than 2 years
Ever since I bought this bike about 2+ years ago, its Shimano derailleurs have been bad. Gears never switch smoothly. Don't know how many times I would have taken it to Decathlon Thane and 2 times to Decathlon Dahisar (Mumbai). When the bike was in warranty, I doubted it and requested the service guy to replace if it was a faulty piece but every time he did something and tried to repair it. Last week on 26th Sep, I went to Dahisar store and told him the shifter problem. The service guy was quite confident to tell me that the issue was fixed. However, the moment I rode on to travel back home (15 kms), I found the same issue. May be the problem is with H or L screw but someone needs to know the job well! Not at all satisfied and I am still riding a faulty bike. How many times can you go to a store for same issue. I am an avid cyclist and I love this bike (in fact all Decathlon products). However, this shifter keeps troubling.
Please check your bike's shifters properly before buying. Or go for an upgraded version.
Noticed front wheel light bend
Used for 2 to 8 weeks
Front wheel light bend , otherwise cycle is ok.
Used for 2 to 8 weeks
Very Good And Comfortable
about the saddle
Used for 1 week or less
saddle is worse , rest is okay , i had bought a local spring saddle cost Rs. 150/- which far better than it , and the accesories are very high priced .
Post purchase service is bad
Used for 2 to 8 weeks
They didn't give me a user manual for how to maintain the cycle.
A lot of squeaky brakes noise on the first ride itself, and it continued on wet tires.
Tire alignment was wrong.
Response of the brand
Dear Shameem, 

Thanks for taking time out to review this product. Decathlon does not have user manuals for any of the bikes sold in its portfolio.  We will be introducing user manuals for bicycles tentatively by November 2018. The Squeaky sound in the brakes is due to the wrong alignment of the tyre. We advise you to please visit the closest Decathlon store for the technical team to have a look into the alignment of the tyre and fix the issue. Hope this is helpful.  

Product of btwin is superior than other make.
Used for 2 to 8 weeks
Awesome product
Great MTB Bike but without the Basic Accessories
Used for 2 to 8 weeks
Have been riding my MTB for 3 weeks now, the ride is good and suspension is a good comfort. The seat of MTB is not so comfortable even after putting the memory foam seat cover (not good for long rides). for shorter rides its very good, gear shifts are smooth.

BTWIN should atleast provide the basic accessories like a Bell , stand and Mud guard (because you end up paying extra for such basic items, which will add to the overall cost) i had to buy accessories worth 4000 that is over the price of the bike.

Hope Decathlon will consider this and atleast provide the basic accessories
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