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. Weight adjusting 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 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.
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 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.
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.
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.
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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Awesome cycle
Used for 3 to 6 months
Awesome and superb cycle.excellent for trekking and fantastic gear mechanism and double v breaking best model for btwin on that amount range
Highly dissatisfied with bike and service
Used for 3 to 6 months
I bought this bike on 3rd July. I am a regular customer at decathlon zirakpur and buy lot of gym accessories from there. However, to improve my cardio function, i decided to buy a bicycle and ended up with rockrider 340. Since then i have faced following problems:-
1. The gears started giving problems a month after i bought the bike. There is a massive problem while moving the left shifter from 2nd to 3rd level as i move from 5th to higher levels on the right shifter to up the speed. The gear does not shift smoothly, there are cracking sounds and i fear it may lead to chain damage and bike may break down at any moment.
2. I recently started getting this weird vibratory noise from pedal which comes each time the wheel completes one rotation. I am not an expert on this but there is definitely a problem there.
3. The service has also been disappointing. For my first free service, i dropped my bike at decathlon store around 11 am. I was told that the service guy comes around 12 pm and you can pick up the bike around 2 PM. I called the store around 5 PM and to my surprise the bike was not serviced even then. As i wanted the bike back in evening, they asked me to pick it up by an hour. I had already informed them about the gear problem. However, 2 weeks after the service, the gear shift problem is back. To add to my woes, a day after servicing, the front brake went loose, putting me at risk while riding. As an emergency measure, i took it to a bike store of another prominent brand and the kind mechanic over there fixed it. A fault in bike a day after service really raises doubt on the quality of service.
4. At the different bike store, i could notice that i could have bought similar bike in the same price range with additional features such as disk brakes. Not to mention, this bike store being in city limits and easily accessibly for a service rather than decathlon zirakpur, which is way out of chandigarh city.
Most importantly, i am facing these issues despite driving on neat and top notch quality roads in chandigarh (Vigyan path and Madhya marg). The bike has been only driven by me and never taken off road or for a rough ride.
DO NOT buy this bike !! If it gives issues to me on a smooth track, it will give issues to everyone. And for all those who have decathlon stores far away, its another reason not to buy as you can not take bike to store every other day for repair.
Response of the brand
Hello Sanjil, 

Thank you for taking the time to give us your review. Apologies for the bad experience you have had with the product. The gear shifting problem has occurred due to the tuning of the shifter. It can be fixed in the workshop. The sound from the pedal needs to be looked into because if the pedal arm of the pedal is broken, we will have to replace it. 
I will give a direct feedback regarding the service experience you have faced to the workshop so that we can improve on the processes the next time. Please let me get in touch with the Zirakpur store to get the best solution. 

Verified purchase What is a review "Verified purchase" ?

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We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

If review is not marked as "Verified purchase", this does not mean that the author's review has no experience with the product may have given his review directly on the site without unique identification, or the product has been offered or paid.

The label "Verified purchase" lets help you judge the reliability of a review.
Used for 2 to 8 weeks
I would like to thank the Deacthlon Indirapuram team for their support and suggestions for my Btwin Rockrider 340 bicycle. The bicycle is really comfortable and smooth. Wishing you all the best for future.
saddle is uncomfortable and rims are corroded
Used for 1 week or less
i bought it from decathlon Ludhiana 2 days ago. saddle is too hard to sit on. and i found that rims are corroded. apart from it everything else is great about this product.
AUSUM loved it
Used for 7 to 12 months
IT is an best bike for little money very nice bike
first day experience
Used for 1 week or less
received the bicycle . the front wheel was missing the tightning key and the axel provided was shorter had to fix it from local shop. the bicycle is just perfect to use.
Good bike but issue with the seat
Used for 1 week or less
I just bought the Bike the day before and looking at beginning cycling on a regular basis. Am looking at mostly riding it on city roads and an occasional trail.
While the bike rides smoothly, I don't find the seat comfortable at all. Even after putting a cushioning seat cover. It's probably because the seat is too small. Is it possible to replace the seat with another Btwin seat which is wider and more comfortable?
really good bike
Used for 2 to 8 weeks
really amazing bike . really good for occasional off-roading . great use as a city bike too . great control . shifting is a bit sloppy and why does the 3 speed grip-shifter have 7 parts? . due to this the front chain guard has worn out in 6 weeks
Response of the brand

Hello Praneeth,

Thank you for taking the time to give us your review. The FD has a series of shifting because the shift required to derail the chain is high compared to the rear derailleur. Since the gap is high between shifts there has to be a series of shifts for the transition to happen. I remain available for more questions. 
Praneeth found this answer helpful
My Reliable friend
Used for 2 to 8 weeks
I got to work everyday on rockrider 340 and it gives a super satisfying super smooth experience on road. Everything is right about this machine except for few things I've noticed. The left side shifter is a little misaligned. I have to shift it to around 2.5 to actually get 2. To get to 3, I have to spin it all the way to 3 and twist it beyond 3 (the spring reacts to it. If we release, it comes back to 3) and keep it there while giving a gradual pedaling. If I pedal a bit faster, and it won't go to 3. Second problem I've noticed, when I go through rough terrain and I'm sitting on the saddle, it makes a slight shearing noise. Am I not supposed to sit when the rear wheel is on irregular terrain?
Response of the brand
Hello Sujith, 

Thank you for the comprehensive and detailed review of the bike. With regards to the sound that is being created in undulating surfaces, it is possible that the seat post is not clamped firmly. It is also possible that there is a problem with the saddle clamp. I suggest you visit our workshop to have the problem addressed to be our technition. 

It is not required to stand on irregular surfaces, you can remain seated. Sometimes cyclists tend to stand on very irregular surfaces to avoid vibration. 

Rockrider 340 Modified
Used for 7 to 12 months
Really good and value for money bike
I had modified it by putting 26 × 2.00 "btwin all terrain tyres
And lights and a frame bag due to club
But the bike is really good
The gear shifting is slightly poor and after 6-7 months the gears slip a lot good V brakes but saddue was quite hard