As a side note, a friend of mine was a tree surgeon and he gave me this advice on buying a chain saw: If the saw you are selecting comes in more than one bar length, choose the longest bar that you are comfortable with.
He explained: The most dangerous thing you can encounter when using a chain saw, is to “catch the tip”. That is having the very tip of the chainsaw engage in the cutting operation. That frequently leads to “kick back” where the saw kicks back at you. If you are cutting a limb that is overhead, it can kick back and get you in the face or head. A longer bar avoids that.
At any rate it is usually $10..00 or $15.00 more and a cheap safety measure that also makes cutting easier.