Can the Lonely Runner Conjecture apply to circular tracks of any diameter?

[Einstein's Cat]

With the lonely runner conjecture, can the runners run along a circular track of any diameter or does the conjecture require that they run along a unit circle?

 

[Simon Bridge]

The track does not have to be a circle, and, although the standard formulation has the track of unit length, it can be scaled to any length track.

 

[fresh_42]

If someone is interested in some details, i.e. current boundaries:
Some remarks on the lonely runner conjecture
Terence Tao

The lonely runner conjecture of Wills and Cusick, in its most popular formulation, asserts that if n runners with distinct constant speeds run around a unit circle $\mathbb{R}/\mathbb{Z}$ starting at a common time and place, then each runner will at some time be separated by a distance of at least $1/(n+1)$ from the others. In this paper we make some remarks on this conjecture.