Lawn Mower Spindle with Blade for John Deere 115 D110 E120 LA115 X126 Mandrel Assembly Replacement Part Number GY21098 GY20454 GY20867 GY20962 AUC15811 GY21099 Blade GY20850 GX22151 AM141033 2-Pack

What It Is

This is a spindle assembly with a blade, designed for John Deere lawn tractors. It replaces a worn or damaged mandrel that drives the blade, restoring cutting performance. It’s sold as a 2-pack for common 42-inch to 48-inch deck models like the D110, D130, E120, LA115, X126, and others.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Fits 42-inch, 46-inch, and 48-inch decks (common on John Deere 100 and X100 series). Not for 54-inch or zero-turn decks.
• Model list: Direct replacement for John Deere 115, D110, D120, D130, E120, LA105, LA115, LA125, X126, X135, X145, X155, X165, and X175. Also fits some older Sabre and Scotts models.
• OEM part cross-reference: Replaces OEM numbers GY21098, GY20454, GY20867, GY20962, AUC15811, GY21099 (spindle) and blades GY20850, GX22151, AM141033. Measure spindle housing height (approx. 4.5 inches) and bolt pattern (3-hole, 3-inch spacing) to verify fit on your deck. The blade is 16.5 inches long with a 1-inch center hole and 0.25-inch thickness.

Key Things to Know

• Quality concerns: With a 3.0 rating from only 2 reviews, some users report premature bearing wear or blade wobble. Inspect the spindle shaft for straightness and the bearings for smooth rotation before installing.
• Installation difficulty: Moderate. Requires removing the deck, unbolting the old spindle (usually 3 bolts), and transferring the pulley. Use a torque wrench to tighten the spindle nut to 70-90 ft-lbs. Blade bolt torque is 45-55 ft-lbs.
• Common gotchas: The blade may need re-sharpening out of the box. The included blade is standard-duty steel—not for heavy debris or rocky terrain. Check that the pulley from your old spindle fits (this spindle does not include a pulley).
• Pack contents: Two complete spindle assemblies with blades, no pulley, no hardware. You reuse your existing pulley, belt, and mounting bolts.

Should You Buy It

This is a budget-friendly 2-pack for DIY owners who need a quick, direct replacement for a worn spindle on a common John Deere lawn tractor. If you need long-term durability or have a heavy-use property, invest in OEM or a higher-rated aftermarket brand. For light residential mowing, it’s a functional stopgap—but check bearings and blade quality before installation.