Are you talking about the mower deck belt ?
If so - It isn't mine, but an 85 year old neighbor has had Snapper RERs for years and has liked them UNTIL his BIL got him a new 33" - He calls it "The Bone Shaker" It shakes and there is no real belt adjustment except to stretch the frame tube. POOR design change:thumbdown:, and yes, his belt comes off and it was never the case with the older models.