There are several types of mast track sections available to be fitted to tube extrusions.            1/2" bolt rope , to 7/8" flat sliders.

 Jib / genoa tracks by Scheafer Marine USA  are stocked at sparloft.                                       3/4"  1"  1 1/4" and 1 1/2"  with matching cars and mainsheet travellers.

1 1/4" 32mm slide track for spinnaker mast cars

Large sail track takes 7/8" flat sliders

1 1/4" genoa track. ( silver or black)