the struts i have are the one for the pt-19 they are fixed gear, the struts just slide over the landing gear where the set screws hold the struts to the wire. my problem is the assembly part of the wheel the instructions do not cover that. the struts i have are set up at the bottom where there is a threaded hole for the socket head cap screw to go through. I just did not know process of assembly for the wheel thanks for help mike