The landing gear is steel wire -- two pieces-spread at the top and tapering to one piece thru wheel.
This gear is FAR superior to carbon fiber or aluminum, for ability to take up landing loads and recover.
I cover the gear with-- shrink tubing -available in all colors and as large in dia as desired.
Also -I have used vinyl graphics sheet - sipmly wrapped over th wires.
This is the easiest ,least expensive method of making a light gear (lightest) which has maximum strength.
I used 3/16" dia on front wire and 5/32" on rear wire -bound and soldered at the base.
If you make a hard landing - the gear just spreads and recovers.
If you whack an obstruction, the rear wire buckles -requiring that the covering be removed- the wire straightened and you are ready to go again
If you really whack it- it cost four bucks to replace.
I once did a TOC project - which required a built up gear - a Bucker Jungmann.
the lightest setup was wire , covered with balsa for contour . Everbody has been talked into carbon fibre as a great light gear .
It may be light - but is a lousy medium for spring characteristics.
Also -It is NOT as light as the wire gear -in usable sections.