2 Pack GY21098 Spindle Assembly for John Deere 42" 48" Mower Decks | Replace AUC15811 GY20454 for John Deere D140 D130 D110 E140 D105 D125 E100 E130 D160 LA145 LA105 E110 E120 LA115 E170 D155

What It Is

This 2-pack of GY21098 spindle assemblies replaces the factory spindles on select John Deere 42" and 48" mower decks. Each spindle houses the bearings and shaft that spin your mower blades; when they wear out, blades wobble, cut unevenly, or stop spinning entirely.

Fitment & Compatibility

Before buying, confirm your deck is a 42-inch Edge, 48-inch Edge, or 48-inch Accel Deep Deck (not the 54" or 60" decks). This set fits over 20 John Deere models including D100/D110/D130/D140/D155/D160/D170, E100/E110/E120/E130/E140/E170, LA105/LA115/LA145, and select LX series. Cross-references OEM part numbers AUC15811 and GY20454. Measure your spindle shaft diameter (should be 5/8") and bolt pattern (two 5/16" bolts on 3" centers) to verify. These are aftermarket, not genuine John Deere—quality is generally good, but tolerances may vary slightly.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket set, torque wrench, and possibly a puller to remove the old spindle. Expect 30–60 minutes per spindle.
• Common gotcha: The included bearings are pre-greased, but check for smooth rotation before installing. A rough spin means a defective unit—return immediately.
• Durability: Most users report 2–3 seasons of residential use before needing replacement. Not designed for commercial/heavy-duty mowing.
• Deck alignment: After installation, check blade tip height (should be level within 1/8"). Shims may be needed if your deck is bent or worn.

Should You Buy It

This is a solid budget-friendly option for homeowners with a compatible John Deere who want to replace both spindles at once (saving time and future hassle). If you need exact OEM fit or have a commercial mowing schedule, spend more on genuine John Deere spindles. For weekend lawn care, this 2-pack delivers good value and reliable performance.