Extreme Flight 125" EXTRA 300 Assembly Manual page 12

19. The landing gear fairings add a nice scale touch to the aircraft but are not necessary.
If you wish to use them, slit the supplied black neoprene tubing length wise with a sharp
hobby knife. Push the tubing onto the rim of the fairing and secure with CA. Attach the
fairing to the gear with "Goop" silicon glue. Alternately you can secure them with a small
screw as shown in the photo above.
20. Install the supplied axles, wheels and pants onto the carbon fiber landing gear.