4 wheel carrier, each side swivels independently
7/8" wheels
1 1/4" distance between wheels center to center (so assume track is also 1 1/4" inside measurement)
Paul from SWISCO responded:
August 30, 2017
I believe you have discontinued Acme Series 2100 sliding door wheels. Compare your rollers to our 23-193 four-wheel roller. Do you think this part can replace your old rollers?