saddletree
/ˈsædəlˌtri/
noun
- The frame or base of a saddle, usually made of wood or synthetic material, over which the leather and padding are placed.
- The saddletree must be strong enough to support the rider's weight without breaking.
- Modern saddletrees are often made from lightweight synthetic materials for durability.
- He carefully carved a new saddletree from beech wood for the custom saddle.