I will have to measure it.

Hello JZK
I have just come across your post regarding Harken Battcars. I also have a 47.7 and am considering either the harken system or the Tides Marine system. What size of track and type of cars do you have?
Our main has SS slides which don't slide worth a damn in the aluminum track, not to mention they are buggering up the mast track.
I also have the tall rig in the boat.
Cheers,
Bob