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I would really suggest this bike for mountain bikers
Owned this bike for a while now, and other than some unusual sounds coming from the chains, (Maybe something done wrong on my behalf, as it was seemless for the first 6 months) it is a fantastic bike. The gears can be sometimes be a bit iffy, but it deserves the high rating. Would recommend for newcomers that are new to the activity.
Bought this for my wife for fire roads and leisure riding. Pretty well built for the money and spec is reasonable. Forks actually feel pretty plush. Not sure it would last too long on proper trails but nothing at this price point could.
I bought 2 of these bikes, one for me and the other for a friend who was looking to start cycling again. It was near impossible to get hold of the ST520 because of the current Coronavirus situation with little stock or no delivery slots available. I was concerned at the colour being high-viz yellow but have quickly grown to like it.
The building of the bikes took about 15 mins each and just needed the handlebars and pedals to be fitted and some minor adjustments to the brake and gear levers to suit.
The bikes have B'Twin on the downtube and not Rockrider as in the photos but I have been reassured by Decathlon that the bikes meet the current spec. I think it may be some old stock that is being used up due to the current situation. It would have been nice to have been advised of this at the time of purchase.
I haven't cycled in 30 years but I have found the Rockrider ST520 ticks all the the boxes for me and is a delight to ride. It was a bit of a gamble because I bought online with no test ride in store. The good reviews convinced me to go for this bike.
I am mainly using the bike on some gravel tracks and canal towpaths and the bike is great for these.
I have now ridden just over 50 miles on the bike and don't have any problems. It took a few miles to get used to using the gears but they are very easy to use. I changed the weight setting on the front forks to a lower weight than I am and found they absorbed many more bumps and made the ride more comfortable.
I have had to change the saddle to something more comfortable! I just couldn't cope with something that was like some medieval torture device. An old style saddle with springs made it a delight to sit on and absorb the bumps from the rear wheel.
Overall I am delighted with this bike and so glad that I persisted in trying to get hold of one given the current situation.
Had only owned this bike for 2 weeks before the chain snapped on me while out on a ride. I'm far from a vigorous rider. And stick to flat road surfaces. So confused why the chain would snap. Regardless I called customer service to see if covered under warranty as a chain shouldnt snap after only 60miles of flat riding. Before I could finish asking the question the person on the phone stated it wasn't his problem and I had to deal with it myself. Utterly unacceptable and unnecessary !! No solutions were provided at all and no help what so ever.
Packaging quality is poor, bike was loose in oversized box with no padding, box arrived open. The bike itself had the handle bars fitted incorrectly, the front and rear brake pads were contacting the discs and the tyres are poor quality and not suitable for mountain biking. Overall the bike, as delivered, was dangerous to ride. After rectifying all issues and replacing the tyres with a thicker lighter MTB tyre I can honestly say this bike is a joy to ride. At this price no new bike on the market compares.
I do like the st520,, had a problem with the left gear changer for the crank gears on 1st day (before riding it) because the mechanism inside snapped/broke upon changing them whilst setting bike up,, decathlon sent me a new one out as well as some spare inner tubes and now works fine even though I was I bit gutted at 1st,, so I hope the pay better attention to the tension of setting components before letting someone safely ride on of their bikes. Apart from this hickup,, I am actually really happy with the bike the ride is quite a smooth one and us an enjoyable ride and for the price I've had bikes that don't ride as smooth for the same price,, suspension is good now I've set it to the correct adjustment, makes the ride feelefeel better,, wheels and tyres roll quite well for a mountain bike (my road bikes are faster but of course there going to be) so that's a bonus since you can't have ya cake and eat it too,, quite happy with the mechanical brakes levers and rotors (but then again I've always had rektro brakes on all my GT bikes). Handle bars feel great now I've adjusted all the components on them for comfort and grips are good to be quite honest, the seat is slot comfier than say the st100 so that helps when riding every day,, love the chunky headset on the stem looks and feels the part feels quit robust and trustworthy. And the pedals are good,, prefer metal ones but the btwin platform pedals seem okay as it goes, and the bike feels quite smooth when accelerating at not much effort,, they seem to have incorporated this in a good way for an entry bike. All in all I do like this bike the st100 that my partner has is okay too,, but I use bikes all the time hence why I went for the dearer option
I.e. ez fire gears, mechanical disc brakes,, smaller brake levers,, adjustable suspension, comfier seat,, chunkier head set (which is one of my fave parts on this bike,, looks and feels the part,, feel like I could go do some bike trails with it,, (iknow it isnt advised to on an entry bike but I reckon ya could get away with some lighter ones), and the frame feels and looks great no too heavy quite clean looking frame looks slot dearer than it is,, so for the price alone I can't really doubt this bike but I hope time doesn't tell but then again unless your just gonna ride it to the park for a picnic on a Sunday and that's it every bike rider knows that regular service and correctmcorrect will make your bike last alot longer. Can't fault the bike appearance is great feels great,, still an entry level bike but I reckon it's one of the better end of them.
- In April 2019 I bought a Rockrider 520.
- In June 2019 I returned the bike to the shop where I purchased it, since the front shifter/dérailleur went out of position and got stuck on the rear wheel while I was riding the bike, blocking the wheel suddenly and making me risk a fall. The issue appeared when the bike was less than two months old, after less than ten rides, for a total mileage of less than 50 miles, and no hard use.
- Later on the same month the bike was returned to me, and a brief test proved that the issue was still there. It had NOT been repaired.
- The bike was finally replaced in late June 2019. The replacement bike did not show the issue, but I did not use it much since March 2020.
- On VE-Day75 ( 08/05/2020), I parked the bike on a rack at RAF Memorial in Englefield Green. I picked up the bike and I could hear there was a problem with the gear shift. As I changed gear, the front derailleur moved out of place and got stuck on the rear wheel while I was riding, causing the rear wheel to lock. I did not crash only because I was riding extremely slow, since I did not trust the bike.
So, one year on, this bike shows the same issue. And it looks like many other reviews are about similar problems with the front derailleur. I would most definitely like to see Decathlon fixing my bike, but I would like even more for the company to RECALL the bike, since this is clearly a design flaw. Bike like this can only damage the value of a brand.
my son is over the moon with his choice.
Newfoundland and Labrador
Prince Edward Island