Cub Cadet deck belt

[Henryr79]

I have a cub cadet xt2 like you buy at Home Depot.
It is supposed to require a 100” deck belt but that is too long. I dropped to a 99” for awhile and now I have to run a 98”. What would cause this. I do have a little slack in the undercarriage for the belt but not that much.

 

[ILENGINE]

XT2 is just series number that can include several different mowers within that series. So please provide the model and serial number from the tag under the seat.