3 Pack Greased GY21099 Spindle Assembly with GX21381 Pulley Replaces John Deere GY21099 GY20867 GY20592 for John Deere 54 inch D170 190C D170 E180 G110 LA150 LA175 S180 E 180 Lawn Tractors

What It Is

This is a 3-pack of greased spindle assemblies (each with a pre-installed GX21381 pulley) designed to replace the factory spindles on 54-inch John Deere lawn tractor decks. It’s a direct-fit maintenance part for restoring blade rotation on decks used with D170, 190C, E180, G110, LA150, LA175, and S180 tractors.

Fitment & Compatibility

• Deck size: Only for 54-inch stamped or fabricated decks. Will not fit 42-inch, 48-inch, or other widths.
• Model check: Confirmed fit for John Deere models: D170, 190C, D170, E180, G110, LA150, LA175, S180, E 180. Verify your tractor’s model number plate under the seat or on the frame.
• OEM cross-references: Replaces John Deere part numbers GY21099, GY20867, and GY20592. If your original spindle has a different number, measure the bolt pattern (typically 3-bolt, 3.5-inch spacing) and shaft diameter (5/8 inch) before buying.
• What to measure: Center-to-center bolt hole distance on your old spindle. If it matches 3.5 inches, these will bolt on. Also confirm pulley diameter (4.5 inches) matches your belt routing.

Key Things to Know

• Pre-greased and sealed: Spindles come packed with grease and sealed for maintenance-free operation—no need to add grease fittings.
• Pulley included: Each spindle has a GX21381 pulley already installed, saving you time and separate purchase. Pulley is steel, not plastic.
• Installation difficulty: Moderate. You’ll need a jack, socket set, and possibly a puller to remove old spindles. Plan 1–2 hours for all three.
• Common gotcha: The pulley retaining bolt can be seized. Use penetrating oil and an impact wrench. Do not reuse old pulley bolts—use the included hardware if provided.

Should You Buy It

If you own a 54-inch John Deere deck (D170, LA150, LA175, or similar) and need to replace all three spindles at once, this 3-pack is a cost-effective, drop-in solution. It’s ideal for DIYers who want pre-assembled, greased spindles with pulleys ready to install—no extra shopping or assembly required. Not for other deck sizes or models.