with a monster 850 u can go with either the original bigs or the 2.0's cause u have a ton of power to spin either tire. the 2.0's are slightly lighter due to the decreased tread width. the originals wear a little better and the 2.0's clean out better and will help keep a pony or so. either tire will suit u well.Thanks guys! And yeah I have the scrambler 850. That size sounds like a winner to me! One last question.... Does it sacrifice speed or acceleration at all?