Sport Quad-400ex Ohtsu Radials or z400 or raptor Z-bar radials. My fast trekkers do good in just about any hillclimb around on the trail.
Utility my bear claws on my rancher do good and what most of the other people said do good to. I had black waters on my foreman and they sucked at every thing . They where ok on the trail but in the mud and snow they relly sucked!!!