E-flite J-3 Cub 25 ARF - Manual (Page 9)

 1. Place the landing gear in position with the larger
diameter wire to the front of the fuselage. Secure
the gear using four landing gear straps and eight
2mm x 10mm sheet metal screws.
  2. Slide the inner wheel hub onto the landing
gear. (The holes in the inner hub do not go
through the hub.) Slide a 4mm wheel collar onto
the landing gear and secure it using a 3mm
setscrew. Use threadlock when tightening the
setscrew onto the flat spot of the landing gear.
9