Yes, they should hook up no problem as long as you are using the knuckle couplers on your set.
The Spectrum 1:20 line uses the same couplers but at a different height. I believe they come with an adapter coupler to match the height of the Big Hauler line.
-Brian
The Spectrum 1:20 line uses the same couplers but at a different height. I believe they come with an adapter coupler to match the height of the Big Hauler line.
-Brian