Tap here to read more about Spindle Assembly for John Deere X310 X324 S130 31P777 S240 X305R X320 42. Premium Quality Replacement Part. Spindle Assembly & Pulley &. 44L777, Z245 EZtrak Residential Zero Turn Mower – 48. Spindle Assembly : AM136733 AM143469 AM134292 AM137483. Height : 169.4mm – 6.66in Outer Diameter : 126.2mm – 4.96in. 3 x Pulley : M155979, GX20335. Width : 20.2mm – 0.79in. Outer Diameter : 127.4mm – 5.01in. Standard Blade : GX21784, AM137757, AM141035, GY20852, B1JD6017. Width : 4.3mm – 0.16in. Height : 69.7mm – 2.74in. Length : 431.8mm – 17.0in. Inner Diameter : 23.0mm – 0.90in – 7 Point Start. Width : 12.3mm – 0.48in. Overall Length : 3700mm – 145.66in.