Unsure if you are asking for Nose Wheel (tire) dimension or the height of the Nose Landing Gear?
Boeing 747-200 49X17 Tire 30/32 ply rating
Boeing 767 H32 X 14-15 20/22 ply rating
Douglas DC-9-50 26.6 X 6.6CH 10 ply rating
Douglas DC10-30 40 X 15.5-16 26/28 ply rating
Reference: "Aircraft Landing Gear Design: Principles and Practices" by N. S. Currey, Pub by AIAA.
DC10 Nose Landing Gear is mounted in the aircraft at a slight angle forward. If the gear was taken out of the a/c and laid down with the wheels removed, the full length of the gear from center of Trunnion mount to center-line of Axle is as follows:
Fully Compressed = 80.17 inches
Static Position = 82.17 inches (weight on gear)
Fully Extended = 97.17 inches
Length of Strut Stroke =17.00 inches
Reference: Boeing Drawing NCG6003