2 Pack GY20850 John Deere 42 Inch Mower Blades with Blade Nuts Replaces GX22151, AM137333, AM137328, UC21583, AM141033 for John Deere 42" D100, D110, D130, X300, D105, E100 Ride-On Tractors

What It Is

This is a 2-pack of aftermarket 42-inch mower blades (with blade nuts) designed to replace worn OEM blades on John Deere 42” decks used on select D100-series, X300, and E100 ride-on tractors. It’s for medium-duty residential mowing on flat to moderately bumpy lawns.

Fitment & Compatibility

• Deck size is critical: Only fits 42-inch stamped decks (not 48” or 54”). Measure your deck width before ordering.
• Model check: Confirmed fit for D100, D110, D130, D105, E100, and X300 series. Does not fit older 42” decks on LA-series or LX-series tractors.
• OEM cross-references: Replaces GX22151, AM137333, AM137328, UC21583, and AM141033. If your current blade number matches one of these, these will fit.
• Spindle hole: Standard 5-point star center hole. Not for oval or round-hole spindles.
• Blade length: 21.5 inches end to end. Measure your old blade—if it’s shorter or longer, these won’t work.

Key Things to Know

• Installation: Moderate difficulty. You’ll need a socket wrench and a torque wrench (aim for 50-60 ft-lbs). The included nuts are self-locking; replace them each time.
• Blade thickness: 0.1875 inches (medium-duty). Fine for grass, but avoid heavy rocks or thick brush—they may bend.
• Balance: Check each blade on a balancer before installing. Some users report minor imbalance, which causes vibration.
• Lift: These are standard lift blades. Not high-lift (for bagging) or mulching blades. Expect decent cut quality but not perfect bagging performance.

Should You Buy It

If you have a 42” John Deere D100, D110, D130, D105, E100, or X300 and need a budget-friendly replacement for worn OEM blades, this 2-pack with nuts is a solid value. It’s not for heavy-duty or commercial use, but for routine residential mowing, it’s a practical, cost-effective choice.