Clearly, if within your 2 year warranty, return it to Decathlon. My experience has been very positive with warranty issues.
If out of warranty, this guy is the expert:-
Click here
There’s a difference of opinion on this:-
@BeBiker goes for the brute force option to remove the original chainring 🤣
I bought the proper tool, a SuperB TB1069, and did it properly! 😉
Just washed my bike and noticed that the rear wheel as several fine cracks in the rim around many of the spoke holes. It may be prudent to check yours!
I’m still under warranty so I’ve fired off an email to decathlon to see what they say.
You’ll need a SuperB TB1069 tool to remove your chainring.
There are several thoughts on this:-
1. buy the tool, albeit not cheap.
2. pay a bike shop to do it.
3. use brute force on the original chainring.