Are plus-size mountain bikes more difficult to ride uphill on?

I would like to start mountain biking and am thinking a bike with plus size tires would be good for a beginner as I read they would give me better traction. I am not looking for speed or to make big jumps, I just want to have fun and stay in shape. My only concern is the added weight may make it more difficult to... show more I would like to start mountain biking and am thinking a bike with plus size tires would be good for a beginner as I read they would give me better traction. I am not looking for speed or to make big jumps, I just want to have fun and stay in shape. My only concern is the added weight may make it more difficult to pedal uphill?
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