The auto-hubs didn't hold up well for us. Made it part way thru 1st winter, tore up the originals and 1 set of replacements. Problem was getting stuck in snow and rocking back-n-forth to get loose. Each change of direction cycled the hubs from lock-unlock-lock, and with the weight and power up front it didn't end well. One thing to remember with manual hubs- as you are on your knee in the mud looking down the trail its a last chance to really decide if you need to go that way for sure....! And I usually do anyway!