I need to know the belt size for a craftsman 2 lawn tractor model# 917255911. The drive belt not the mower deck belt.

I'm sure you've found your answer by now. But, since I am new to this website and was looking at unaswered posts I figured I'd answer.

The drive belt that Sears lists for you mower is a Sears #101342N, which is also a Gates 6893. That is a 1/2" X 93" belt.

Thanks, I had the same question. I love the interweb.

See web site http://outdoorpowerinfo.com/belts/Sears_belts.asp