Replace OEM:

MTD,Cub Cadet,Troy Bilt 756-05111

Fit Models:

MTD: Craftsman R1000, Z6000, ZT-S42

Cub Cadet: RZT-L42, CC30 Mini Rider, RZT S42, RZT SX 42, ZT1-42, ZT2-60

Troy Bilt: TB30, Mustang 42 XP

Notes:

12 point splined ID

OD 6 3/16"  Height 15/16"