Bikes are way more common and popular in Belgium as well as Europe than in Cambodia. Possessing a bike is very important, for it allows you first of all to get to know your neighborhood faster. Besides it also allows you to get to where you want to go faster. Furthermore, I use my bike like a horse (I call him Brown Horse) to carry my heavy loads of groceries almost every week. Last but not least, in case you would like to go cycling around the outer ring of Hasselt or further away from Hasselt, you can always have the motivation to do when you possess one.
You can rent a bike from a bike shed (VEDO) for only 25 Euros with 70 Euros for the deposit. You will get 70 Euros back as soon as you return the bike.
One thing you had better be aware of now is the road condition in Hasselt is that there are a lot of tunnels for pedestrians as well as cyclists. This mean, you will be usually cycling up and down the slope all the time. Consequently, when you go to rent a bike, make sure it has at least three gears.