Tyre levers are tools used to remove and install bicycle tyres from their rims. They are designed to make the process of changing a tyre easier by providing leverage to separate the tyre bead from the rim. This is especially helpful when dealing with tight-fitting tyres that can be challenging to remove by hand. These levers are designed to provide strong leverage, much like a crowbar is used to pry things open due to its leverage-enhancing design.