Considered them for my Attak but backed away just did not think they would hold up well on road shoulders that I must ride to get to the trailhead. Bergstrom triple points with ski savers & shims just plain work to eliminate darting & wear very well & made in USA.
Also has been some over steering poblems with snowtrackers with new Yam skis so don't want that. Road with another Jder with 2011 Apec XTX & he was pushing on same trails I was carving so in that head to head snowtrackers did not do so well but he was on 2011 XTX & I was on 2007 Attak so lots of design changes between sleds as well.