David,

With the 100 series you can make a choice of using 5/32 or 3/16 wire. You also have the option of getting a firewall mount nose gear.

The 200 series is 3/16 wire only with no option for a firewall mount.

Acutally my 101HD mains are drilled for oleo struts. Adaptors were supplied to accommodate the 3/16 gear strut.

Clay