trek 920 chainring removal
I just got myself an old (but don't know how old) Trek 920. It just seems like a sturdy little bike that I want to use for around town biking. It looks like it hasn't been maintained at all, so it requires a firm cleaning, and perhaps some new parts here and there. I'm not very familiar with mountain bikes (I road bike mostly) and kind of got stuck on the chainring removal.
It seems like the chainrings are stamped together, and there aren't just a couple of bolts I can remove to take them off (like on my road bike). Seems like I first need to remove the cranks to get to the chainrings? True? Does anybody know what type of crankset is fitted on the trek 920? What type of crankpuller do I need (if I need one)? In other words, how do I remove these chainrings???
I don't know what year the bike is, I estimate about 10 years old or so, and it's got the stx front and rear derailleur.
Not sure if I can post pics, but if yes, I'll try to make one, so that you can perhaps see what I mean.
Thanks for any input, appreciate it!