This bearing kit will Fit the following tractors with 48" or 54" decks: F510 X324 2254HV GT242 X340 2354HV GT262 X500 240 GT275 X520 2554HV GX255 X534 260 GX325 X540 265 GX335 X700 325 GX345 X720 335 GX355 X724 345 G100 X728 355D LTR155 X740 2210 LTR166 X744 4010 LTR180 X748 4110 LX176 Z425 4115 LX178 Z445 4210 LX186 116 4310 LX188 116H 4410 LX280 1842GV 4510 LX289 1848GV 4610 SST16 1848HV 4710 SST18 1842HV S2048 1948GV S2348 1948HV S2554 2048HV X320 2148HV