Joined: Jul 2002
Posts: 40,863
Likes: 3,116
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
What do you mean by change it freely with a larger one? Do you mean mounting larger tires? The size of the tire is going to be limited by the frame and fork of your bike. Without knowing what kind of bike you have, it's difficult to say.
That said, you can probably mount 25mm tires.