Spindle Bearing For For Exmark Models: Fmd523 - 52" Turf Ranger Front Mount Mower 1998-2001 Fmd523 - 52" Turf Tracer Hydro Walk-Behind Mower 1998-1999 Compatible With Cub Cadet: Zth 5221 Kaa (968999180) (2006-04) Zth 5223 Kaa (968999181) (2006-04) Zth 5223 Koa (968999182) (2006-04) Zth 5223 Kola (968999183) (2006-04) Zth 5225 Kaa (968999185) (2006-04) Zth 5225 Koa (968999184) (2006-04) Zth 6123 Kaa (968999203) (2006-04) Zth 6123 Kola (968999189) (2006-04) Zth 6125 Kaa (968999186) (2006-04) Zth 6125 Koa (968999187) (2006-04) Zth 6126 Koa (968999188) (2006-04) Zth 6127 Koa (968999201) (2006-04) Zth 7226 Koa (968999175) (2006-04) Zth 7227 Koa (968999202) (2006-04) Compatible With For John Deere: M653 Mid-Mount Ztrak M665 Mid-Mount Ztrak Order Includes: 1x Spindle Bearing: JD8597 8597 1-513016 IH60071C92 IH586609R92 IH455102R21 586609R92 455102R21 60069C91 IH60071C91 IH455102R22 Inner Diameter: 25 mm - 0.98 in Outer Diameter: 52 mm - 2.04 in Width: 21.20 mm - 0.83 in 1x Locking Collar: Outer Diameter: 37.90 mm - 1.5 in Inner Diameter: 25.66 mm - 1.01 in Width: 13.50 mm - 0.53 in