Shortest distance I have seen a set of greens last is about 6 miles.
That was on Kim Mathers Sunbeam on the Promenade rally about 6 years ago now. They were brand new in on stage 1 and had to be binned as they were down to the metal by the end of stage 2.

I once opened a box and looked at some

Couldnt bear myself to touch them though.

Greens reds yellows and I think blues ? were given to us FOC to try out by a magazine.

They were sent back with a note saying no thanks