First chain worn after only 500km?
So I'm a new cyclist who got a budget Decathlon bike (Riverside 500, if relevant) a bit over a month ago and is wanting to learn more about keeping it up, maintenance, etc.
I also at the time got a cheap Decathlon chain wear checker but have since learned those can be useless, so when it showed full wear I didn't stress out right away. That is until I got a CC-4 yesterday and it went to .75% with ease too. I'm just a bit confused as I have only ridden around 600 km on the bike.
I understand wear depends on several factors but isn't this really low mileage? Could it be that the chain that came with the bike just wasn't very good, or is there something I should be mindful of when I put the new chain in?
Thanks in advance!