Tap here to read more about Caltric AM141040 M112991 M154158 AM137325 Spindle Blade for John Deere. Premium Quality Replacement Part. Deck Spindle & Pulley. Compatible with Toro Models. 74539 – 52 GrandStand Stand-On Mower (SN: 311000001 – 311999999) (2011). 74295 (Z500) – 52 Z Master Zero-Turn Mower (SN: 311000001 – 311999999) (2011). Width : 193mm – 7.59in. Inner Diameter : 16.5mm – 0.64in. Outer Diameter : 227.5mm – 8.95in. Width : 24.3mm – 0.95in. Inner Diameter : 48.4mm – 1.90in. Outer Diameter : 170.6mm – 6.71in.