If it's legal in the State you come from, legal in the State you are entering Canada from and the Province you are going into I don't think it should be a problem. I googled your question and found a bunch of Canadians that do it just like folks do in the US. A few stated you needed side mirrors.
You can ask US Customs a question below:
2011 JKU Sahara; Sahara Tan, Leather, 3.73, Auto, Hard/Soft Top, SpiderWebShade, Dead Pedal, Skid Row Foot Pegs, BFG KO2, 10a Wheels