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I got this bike off Craigslist because I want to do some casual to intermediate mountain biking once the snow goes away.
It's not in great shape. There's cracks around the tread which makes me think it needs new tires. It seems to shift through the gears okay but I haven't ridden a bike in years so I have no reference.
Are disc brakes a must?
Shimano Deore derailleurs.
What things should I look out for that may need adjustment/ repair/replace?
Im pretty handy, would I be able to do these things myself or are special tools needed?
Should I just take it to a shop and have them fuck my shit up?