Singletree vs. Doubletree — What's the Difference?

The pivoted horizontal crossbar to which the harness traces of a draft animal are attached and which is in turn attached to a vehicle or an implement. Also called regionally whiffletree, whippletree.

A crossbar on a wagon or carriage to which two whiffletrees are attached for harnessing two animals abreast.

A bar behind draft animals and in front of a load, such as a wagon, that balances the load. Generally the animals are attached at the ends and the wagon or other load to a pivot in the middle of the singletree.

A device that connects two horses to a wagon or other implement. The tugs of a harness are connected to a singletree, two of which are connected to a doubletree, which, in turn, is connected to the implement.

The pivoted or swinging bar to which the traces of a harnessed horse are fixed; a whiffletree.

The bar, or crosspiece, of a carriage, to which the singletrees are attached.

A crossbar on a wagon or carriage to which two whiffletrees are attached in order to harness two horses abreast