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 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.
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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Good Bike though quite useless out of the box.
Used for 2 to 8 weeks
Upgraded from BTwin Mybike 7s to RockRider 340 recently. The bike out of the box was quite useless -

1. The default gear shifters are impossible for long rides - sprain on my wrists took two days to subside. Too much effort to shift using your wrist and the dynamics/friendliness is just wrong !

2. The hand grips for both hands are extremely narrow - no space for the fourth finger! Weird.

3. No mudguards - problem is the extra purchase required for the rear guards and a wasted front guard.

To fix the above three, had to buy :
1. Thumb shifters to replace the wrist/rotation shifters : Rs 1000 /-

2. Wider rubber grips : Rs 200 /-

3. As there are no back mudguards available in stock, you end up buying the a pair used by 7s wasting the front guard which comes with it. For the front, there are good ones available. 1 front + 1 pair for 7s for back = Rs 1050.

Once the additional expenses were met (~ Rs 2250 /- ), the bike rocks as expected and rides are quite an experience.

The workshop folks at Decathlon Whitefield have been extra helpful with their suggestions and service - quite commendable.

Wasted scrap bits (Decathlon doesn't take it back either):
1. Wrist Shifters.
2. Narrow Grips.
3. 7s Front guard.

To summarize, Decathlon/BTwin should really replace the default shifters and default hand grips as they are just useless by all standards. Further, they should stock proper back guards so that customer is not forced to buy a 7s pair instead.
Verified purchase What is a review "Verified purchase" ?

Where review is marked as "Verified purchase" confirmed by Decathlon, this means that we could verify that the client who filed this opinion has purchased the product from us.

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
Not the best..
Used for More than 2 years
I purchases this bike from Hennur Branch for daily commutation to office and rare outside trip (I was more interested in Rock driver 520, however the sales man suggested this). I have found couple of issues with gear system.. Changing the Gear to 1 on up doesn't work properly, sometime I am afraid the chain is going to break (so loud noice). 2. Gear change is not smooth.. while changing the gear especially on up, change becomes too lose, so I hurts badly as u lose all the control.

Seating is another issue but not that bad.
very nice cycle
Used for 1 week or less
this cycle is very nice
Best of all bikes i had
Used for 1 week or less
I bought my rockrider 340 from decathlon vytilla, cochin last week and till now I have clocked 150 kms in it. Very smooth to ride for 3 hrs continuously with padded cycle shorts. Fears are very smooth to change while pedaling and it is very precise too... Speed that I maintained is 24 km/hr as per the digital speedo installed. Now I am using it for workouts, commute and tour. I have taken my bike to kochi and visited some historic place which I would have avoided if I am in my motor cycle. Altogether , my experience with rockstar and decathlon is fantastic and memorable.
Suspension noisy
Used for 7 to 12 months
Suspension is bad...producing too much noise even for the smallest bump, speed breaker
Unhappy about quality of cycle
Used for 2 to 8 weeks
We have bought this cycle on 2nd April. Since first day front brakes not operating properly.Also, chain sprocket plastic cover screw got damaged on first day itself.
Response of the brand
Hello Sir, 

Thank you for taking the time to give us your review. Apologies for a late reply. The bike should not have problems with the brake in the beginning if the 14 point check was done before the bike was delivered to you. Please let me know from which Decathlon store you purchased the bike. I will inform the store regarding the problem and the store team will get In touch with you for a solution. 

Bad tube quality, problematic gear transmission
Used for 2 to 8 weeks
Poor quality commitments . The quality of the tyres is just local quality. I don't even ride on rough terrain. The roads are pretty smooth. Still the tyre got burst and that too not because of any sharp edge, it was just because of its low quality manufacturing or probably old tube in the bike. The tyre got punctured from the point of inlet, which definitely can't be categorised under, wear and tear within so less time. Went to the store, they said, they can't do anything it's not under warranty and did their 7-14 point checkup and sent me back! Worst experience ever. Why would anyone spend 16k that too stuffed with low quality material and poor experience to resolve the problems. I don't know why should I recommend this bike to anyone. When I bought it then also I was facing gear transmission issues from the first day itself, which was later repaired by them. I thought it'll solve a lot of my problems, but it has just increased my overhead costs. Plus, the seat is also uncomfortable but lookwise the bike look sporty and for athletic people.
Response of the brand

Hello Swapnil, 

Thank you for taking the time to give us your feedback. Apologies for the ill experience you have had with your new Rockrider 340. The bike is installed with Ralson tires and tubes. Ralson is one of the best tire manufacturing companies in India. If the tube busted it will have to be due to over pressure or due to repeated usage of the pump at the point of inlet which if not held rigidly is possible to wear out. The recommended PSI is 35-40 depending on how much cushioning you want. Unfortunately, both tires and tubes are not under warranty because they are under wearable components which is why the store refused to service it for free. 
Deepak Babu E-sport manager DECATHLON
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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