Those look like extra long skid shoes made with polyurethane as opposed to steel.
Here's a polyurethane skid shoe with a roller wheel ....
http://www.amazon.com/arnold-univers.../dp/B00PBGM7RM ..... $32.57/2 ..... video link worth watching! ....... is somewhat similar to an Alaska airplane with landing gear skid/wheels designed for snow covered, not paved landing fields ..... or something!
Attention Moose Jaw Airport ...... this is the TroyBilt 2410 ...... coming in for a super smooth landing on your half snow, half pavement, half dirt, half grass runway ...... is similar to that Plymouth NH Municipal Airport...... a flying snowblower ..... Roger that!!! ......
