Tyres are the most important component on any bike. Being the interface between bike and the Earth the right tyre will transform performance and ride quality in ways that no other component can. If you skimp on tyres you're literally fucking yourself in the arse.

A cheap bike, assuming everything is set up correctly, with superb tyres will ride nicely, a top end bike with shite tyres will ride like shite. It's astonishing how many people you see riding £3k+ bikes with £15 tyres.

Like wearing clogs for a football match.