Comment 91 for bug 124440

Confirmed, gnome-control-center is where such a setting would live. So I am reopening that task at least to avoid people logging duplicate bugs.

However, keep in mind that mouse wheel ticks are emitted as button click events which have no "size" that can be controlled from a central location. This means each toolkit needs to implement the setting separately. If it was implemented for GTK-3 then that's no guarantee that the setting would be honoured in Chrome or Firefox because they have their own separate toolkits.