GELASKA GY20850 Mower Blades with Blade Nuts Fits John Deere 42 Inch Mower Blades D110 D100 D105 D130 E120 S100 S120 E100 LA115 LA105 Replaces AM141033 GX22151 UC21583, 2 Pack High Lift

What It Is

The GELASKA GY20850 is a 2-pack of high-lift mower blades (with blade nuts) designed for 42-inch John Deere lawn tractors. These blades create stronger upward airflow for better grass clipping discharge and mulching in high-growth conditions.

Fitment & Compatibility

Check these before buying:

• Deck size: Fits only 42-inch cutting decks (not 48" or 54").
• Models: Compatible with John Deere D100, D105, D110, D130, E100, E120, S100, S120, LA105, LA115, and similar.
• OEM replacements: Replaces AM141033, GX22151, UC21583. Confirm your current blade part number matches one of these.
• Physical check: Blade length is 21 inches, center hole diameter is 1 inch, and thickness is 0.25 inches. Measure your old blade to verify.
• Blade nuts included: Two 5/8-inch blade nuts come in the pack—confirm your spindle bolt size matches.

Key Things to Know

• High-lift design: Increases airflow but may strain the engine if you mow very thick or wet grass—avoid overloading.
• Installation difficulty: Easy for DIYers; requires a socket wrench and jacking the mower deck. Torque blade nuts to 70-80 ft-lbs.
• Common gotchas: Blades may arrive unsharpened or with light coating—sharpen before first use for best cut. Check for balance after sharpening.
• Durability: Made from heat-treated steel, but thin profile (0.25") may wear faster than OEM blades in sandy or rocky soil.

Should You Buy It

If you have a 42-inch John Deere lawn tractor with a compatible model and want affordable high-lift blades that improve discharge and mulching, this 2-pack is a good value. It’s best for homeowners with standard grass conditions—skip if you need heavy-duty blades for frequent tough mowing or if your deck size differs from 42 inches.