Tap here to read more about Caltric AM141040 M112991 M154158 AM137325 Spindle Blade for John Deere. Premium Quality Replacement Part. Compatible with Bush Hog Models. ATH600 60″, ATH720 72″. HDE SERIES ZERO TURN MOWER 49″ 55″ 61. RDTH 60 RDTH Series. RDTH 72 RDTH Series. 3 x Spindle Assembly: 50051388, 88757, 88754, 97658, 88753, 9162000. Length: 191 mm – 7.51 in. Outer Diameter: 136 mm – 5.35 in. Mounting Hole Distance: 91.5 mm – 3.6 in.