Drive Disc for Troy-Bilt Tiller (GW-2111) Drive Disc for Troy-Bilt Tiller (GW-2111) Replaces (OEM): GW-2111 2111 GW-1485 1485 GW-1919 1919 GW-2732 2732 756-04171 88174 Fits Troy-Bilt 1989 and newer. Dimensions: ID: 3/8" OD: 3 3/4"