This tailwheel base is optional for the WHLT-11D (can be added to other units). This part is machined from aluminum extrusion. It is to be used with 1.75 wide flat springs at a 45 degree angle to the ground using two mounting bolts 1.5 inches apart. This unit has two 5/16 inch attach bolt holes that can be opened to as much as 7/16. See the WHLTWBE for the single bolt attach version. The WHLTWBADT1.5 adapater allows fit to a 1.5 inch wide spring and the WHLTWBADT1.25 can be used additionally to reduce further to 1.25 wide.
This part can be added to the WHLT-11D when purchased new by specifying the TWBEOPTD option.