I have a brand new, never used, Stens 265-099 lawn mower drive belt which is compatible with many 48" mower decks from John Deere, Sabre and Scotts, including:

LX176, LX178, LX288, 240, 245, 260, 265, 285, GT242, GT262, GT275, GT225, GT235, GX325, GX345, 325, 345, X320, X324, X360. It also fits some Sabre models (1842GV, 1948GV, 1948HV, 2148HV) and Scotts models (S2048, S2348) from 1999-2001 with a 48" deck. The belt is about ~97" long x ~0.5" wide. Let me know when you can come and get it. Deere part M154958

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mower deck belt (Rush, near Henrietta)