I'd like to pass along some information that I have discovered for the drive belt for the snow blower for the 2100 series Cub Cadet.
First of all, the original belt by Cub Cadet is 1/2" X 75" V belt. I have burned and broken more than 10 of these across the years due to the belt being too small and too narrow.
In my research, the belt that lasts is made by TruBlue at
www.stens.com. The belt # is 258-078 which is 5/8" wide by 78" long. Works beautiful! You most likely will never have to replace!