I don't know how I missed this post, because I have been wondering this same thing almost daily. I own the Ace, and I have been up and down test hill several times.
Since you are from Michigan, you are well aware that there is hardly a square inch of any property that doesn't have 3' of snow. So I have not had a chance to do any type of dirt or sand riding yet. I'm quite sure it will make it up the hill... If a Yamaha grizzly 350 can do it, this Ace can for sure. Wild bills ATV rental says the grizzly 350's will make it up all the hills(according to website)
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