For students in Leuven, VELO offers second-hand bicycles or recent / new bicycles for rent. Place to be: Hollestraat 1, Heverlee.
The price depends on the type of bike and the rental period. You always pay a rental amount (on an annual basis between € 72 and € 95) and a deposit (between € 70 and € 130). You will get the latter back when you return the bike.
If you want to rent a bike, first register online using this link: https://beta.newlink.cz/citybike/