OakTen Spindle Assembly for John Deere D170 E180 G110 LA150 LA175 Lawn Tractor, Replaces GY20592 GY20867 GY21099, Fits 54 Inch Deck - 7 Point Star Blade Adaptor, Mounting Screws Included, 3 Pack

What It Is

This is a set of three complete spindle assemblies for the 54-inch stamped deck on several John Deere lawn tractors. Each assembly includes the housing, bearings, shaft, and a 7-point star blade adapter—plus mounting screws. It’s a direct replacement when your original spindles are worn, noisy, or have play in the blade.

Fitment & Compatibility

Check your deck type first. These fit only the 54-inch stamped steel deck (not the fabricated 54-inch deck). Confirmed models: D170, E180, G110, LA150, LA175. Also fits X300, X304, X320, X324, X340, X360, X500, X520, X534, X540, X560, X584, X590, X720, X724, X728, X729, X734, X738, X739, X740, X748, X749, X750, X754, X758, X759 (verify your deck serial number).

Replaces OEM part numbers GY20592, GY20867, GY21099. The 7-point star adapter is for blades with a 7-point star center hole (common on 54-inch decks). Measure your blade center hole before buying—if it’s a round hole or different star count, these won’t fit.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a jack or ramps to lift the mower, plus basic hand tools (socket set, torque wrench). Expect 1–2 hours for all three.
• Quality: These are aftermarket spindles with sealed bearings. They match OEM dimensions, but some users report slightly different grease fitting location—check clearance before final tightening.
• Common gotcha: The included mounting screws are often M8-1.25 bolts. If your deck uses different thread pitch, reuse your original bolts. Always torque to spec (typically 35–40 ft-lbs).
• Warranty: OakTen offers a 1-year warranty. Keep your receipt and original packaging in case of early failure.

Should You Buy It

Buy this if your 54-inch John Deere deck has noisy or wobbly spindles and you want a complete drop-in set without sourcing individual bearings, seals, and housings. It’s a solid value for DIY owners who want to fix all three spindles at once. Skip it if you have a different deck size, a round-hole blade system, or want OEM-only parts—stick with John Deere spindles instead.