Rockrider ST900S, Full Suspension Mountain Bike, 27.5"

It's beautiful when it's new. But after 2 years it's problem after problem. And the after-sales service parts don't hold up. Major repair in May, in July an HS cable (under warranty), and there 14/09, the HS cable again...

Maximum satisfaction. Everything works, great.

My son's Leclerc full-suspension mountain bike is more solid... The brakes are ridiculous (there are no marks on them) after a break-in carried out as recommended by the "manufacturer" the 2 brakes vibrate and make noise …The wheels have no marks on them either …they squeak after barely 1 week of use The paint comes off on its own …The tires mounted upside down …The grips break down under sweat hands… The rear shock absorber loses too much oil… And so on… A mountain bike at 1000€ which is not even up to the level of mountain bikes at 200€ in terms of reliability… It looks good, it is very beautiful but it's a real toy and not a mountain bike for mountain biking.

My bike for the ride to work. 25 km of asphalt, gravel and an approximately 10% gradient. Sure, the brakes aren't the best, nor is the gearshift - but it works perfectly. Replacement components are available for little money. I still have high-quality tires installed and high-quality pedals. So I invested around 150 euros. But it pays off. I still have two much more expensive bikes but the seating position and comfort are really unbeatable. Good work by the technicians. Summary: really a lot of bike for this price

The mountain bike was given to me raw from the factory, without adjustments (the front brake disc was not aligned), no saddle setback adjustment relative to the buyer, the rear suspension loses air, 10psi, after 10 km, re-inflation obligatory) And the most annoying thing is the constant noise of the spokes (I asked to check the tension of the spokes, but the workshop does not have the device) Also, I finds that the performance is low, a 34 tooth on the chainring at the front would be much better

So far, I have ridden approx. 150 km on broken terrain (roots, gravel roads, stony routes, muddy terrain and asphalt and panels) and I am completely satisfied. A single gear does not allow for very fast riding on smoother surfaces, but this bike is not designed for that. It handles uneven terrain with ease and the suspension is excellent. I'm at the limit of the load capacity of the frame, and despite that, this bike just doesn't talk and grind as you need it to. Single gear, on the other hand, is great for hills, where you don't have to worry about whether you have a large, medium or small chainring on the front drive. I struggled for a while with the optimal rear shock pressure, but finally settled on 170psi and it's a blast. When I tried Decathlon's recommended 200psi due to my heavy weight, it was too much and the bike protested with weird noises when the load changed, so lower psi solved it. I would appreciate more info when picking up the bike at the shop. Set up to take over so when I did the first 3 rides I couldn't feel the bottom - then I re-adjusted the seatpost and it was all sorted. The brakes respond great. The derailleur will need to be adjusted after a few rides, it sometimes doesn't listen in the middle gears, which is quite annoying, for example on hills, when it slows you down a lot, but that's about the adjustment, it's not a defect of the bike. Lights are also supplied with the bike. The rear is still OK, but the front seems to be missing. The handlebars are robust, so you can't place the light anywhere other than the brake and shift levers, so the light shines sideways and sideways. Still better than nothing. I will probably replace the basic heels with other ones, but they are not completely bad. Overall, this bike is a great companion. I recommend!

Pleasant position, accurate shifting with a good range of speeds, in my opinion, quality tires - precise guidance

It is a very good bike that has allowed me to go out in high mountains and do positive slopes of 1000 meters, although I don't know if it was designed for this, because on stony or very irregular slopes of more than 20% downhill I don't control it too much. On the other hand, I find that in the store, although the attention has always been correct, they do not give you enough information about operation and maintenance, and the truth is that a lot is needed, especially since the bicycle manual is limited to giving technical specifications but hardly gives explanations.

I've been buying bikes for the whole family at decathlon for a long time and to be honest I'm happy, I bought the MTB ST 900 S model for my son about three years ago (he didn't spare him), the bike was used intensively and nothing serious happened, serviced once a year and maybe once a little adjustment or two and that's it. I recommend the bike, and if someone thinks that it is too weak, etc., I recommend buying the T-72 tank. Regards to Decathlon and users ;-)

Satisfied with the workshop service of the Montbéliard store BUT extremely disappointed with the quality of this VTT Vélo bought in 09/21 after months of waiting for availability and in anticipation of Christmas 03/22: exchange of the frame as a warranty pb alignment of the rear wheel with the frame. The second frame slightly improves the centering of the wheel. Question asked by the workshop department to the cycle quality department without an answer… 06/22: exchange of the REAR wheel freewheel play problem 06/23: same problem 07/23: after a few rides the play is reappearing I do without the derailleur which does not allow back-pedaling without the chain changing sprockets, behavior reported as normal in the workshop. Certainly the last mountain bike purchased from DECATHLON

The bike scratches very quickly, every scratch is very visible on the frame. The problem is not the use of it, but the quality of the varnish on the frame. In some places, it comes off in several centimeter patches. A year after buying the bike, the chain tensioner broke down, which was repaired in the service, but after a while it only worked halfway. After 2 years, the derailleur, crank, shifter and chain should be replaced by exploitation. The repair cost is about PLN 800. Currently, I have not done the repair yet and the derailleur does not work at all and the gears do not change. In addition, I bought shifters intended for exactly this bike, which turned out to be as tragic in quality as the bike. The levers twisted and could not be tightened. At some point, the handle turned and I fell down, then I threw them in the trash. I contacted customer service and they said there is nothing they can do about it. After my experience with this bike, I wouldn't buy it. In no way is it worth buying and spending so much money on such a tragic quality thing. The only plus is the service which is very helpful with my frequent visits. If someone is looking for a durable and quality bike, it is better to go for proven brands. For your own pocket, it is worth avoiding rockriders and btwins which, in addition, like to break.

Product of very qualitative appearance, to see in the future but I am very satisfied with my purchase value for money. I recommend