Originally Posted by gulencocuk

I agree that the Decathlon bike is a good value in today's market conditions.
I bought a Sora-equipped bike for my wife and 'tested' it for 600 km. I normally use 105 and Tiagra fitted bikes, and I think the current Sora groupset is just fine. The only noticeable difference based on my experience is that Tiagra and 105 feel just a bit tight and quick when shifting. I'm not an expert but maybe the narrower chain also helps Tiagra and 105.

Considering the longevity of 9-speed chains compared to narrower 10 and 11-speed chains, a Sora groupset might be the best option for cost-effectiveness in terms of maintenance. I'm thinking of building a Sora-equipped commuting bike after seeing how fine it performs.