GX22151 GY20850 Gator Mulching Blades Compatible with John Dee re 42 Inch Deck D100 D110 D125 S100 S130 S240 LA100 LA105 LA120 LA135 E100 E120 Lawn Tractor Riding Mower,Toothed Mulching Blade, 2 PACK

What It Is

This is a 2-pack of toothed mulching blades designed for 42-inch John Deere lawn tractor decks. They replace standard lift blades to chop clippings finer for better nutrient recycling and a cleaner cut.

Fitment & Compatibility

Critical checks before buying:

• Deck size: Only fits 42-inch John Deere mower decks. Measure your deck’s cutting width—not the tractor model alone.
• Model list: Works with D100, D110, D125, S100, S130, S240, LA100, LA105, LA120, LA135, E100, E120, and similar 42-inch deck tractors. Verify your specific model’s deck size (e.g., LA105 may have a 42” or 46” deck).
• OEM cross-reference: Replaces John Deere parts GX22151 and GY20850. Confirm your current blade part number is one of these or a compatible equivalent.
• Center hole & spindle: 5-point star center hole, fits standard John Deere 42-inch spindle. Measure your spindle bolt pattern if unsure.
• Blade length: 21 inches (from tip to tip). Measure your old blade to confirm.
• Quantity: Sold as a 2-pack—one for each spindle on a 42-inch deck.

Key Things to Know

• Quality: 4.6 stars from 37 reviews—users report good durability and sharpness out of the box. Not hardened like premium OEM, but adequate for residential use.
• Installation: Moderate difficulty. You’ll need a socket wrench and torque wrench (recommended 50-60 ft-lbs). Lift or tilt the mower safely; block wheels. Use thread locker if bolts are loose.
• Mulching vs. bagging: These are dedicated mulching blades—they won’t bag well. If you switch between bagging and mulching, consider a 3-in-1 blade set instead.
• Common gotcha: The toothed design works best with dry grass. Wet or thick grass may clog or leave clumps. Raise deck height for tall grass.

Should You Buy It

Buy this if you have a 42-inch John Deere lawn tractor from the listed models, want to improve mulching without paying OEM prices, and primarily mow dry, moderate-height grass. Skip if you need bagging performance or have a different deck size.