Lawn Mower Blades Replacement Part Number John Dee re 42 inch GX22151 GY20850 AM131033 AM137333 AM141033 Compatible with 102 105 115 135 D100 D105 D110 D125 D130 LA100 LA105 E100 E110, 2 Pack

What It Is

This is a 2-pack of aftermarket 42-inch lawn mower blades designed to replace OEM part numbers GX22151, GY20850, AM131033, AM137333, and AM141033. They fit select John Deere and similar-brand lawn tractors (models like 100 Series, D100, D105, E100, LA100, and others listed) with a 42-inch cutting deck.

Fitment & Compatibility

• Deck size: Must be exactly 42 inches—measure your deck width (cutting swath) before ordering.
• Model check: Compatible with John Deere 102, 105, 115, 135, D100, D105, D110, D125, D130, LA100, LA105, E100, E110, and similar. Cross-reference your mower’s model number with the OEM part numbers listed.
• OEM vs aftermarket: These are aftermarket blades, not John Deere OEM. They should match OEM dimensions (length, width, thickness, center hole size, and sail height). Verify the blade length is 42 inches (center hole to tip) and the center hole diameter is standard (typically 1 inch or 5/8 inch—check yours).
• What to measure: Lay your current blade flat. Measure from center hole to tip (should be ~21 inches for a 42-inch deck). Also, check the number of mounting holes (usually one center hole) and any offset or curved shape.

Key Things to Know

• Quality: At $22.99 for a 2-pack, these are budget-friendly aftermarket blades. They may not be as durable as OEM John Deere blades (e.g., thicker steel or better heat treatment), but reviews (4.7/5 from 15 ratings) suggest decent sharpness and balance out of the box.
• Installation: Easy—remove the old blade (use a socket wrench, secure the deck, and note orientation), install the new one with the sail facing up toward the deck. Torque the bolt to 30-40 ft-lbs (check your manual). No special tools needed.
• Common gotchas: Ensure the blade is installed with the correct orientation (curved side up). Aftermarket blades may have slightly different balance or thickness—if you notice vibration, use a blade balancer or return them. Also, some mowers require specific blade shapes (e.g., mulching vs. high-lift); these appear to be standard lift blades for bagging/discharge.
• Check for fit: If your mower uses a star-shaped or unusual center hole, these blades won’t work—most John Deere 42-inch decks use a standard round hole.

Should You Buy It

Buy these if you need a low-cost, functional 2-pack of blades for a 42-inch John Deere or compatible lawn tractor, and you’re comfortable with aftermarket parts for basic cutting (bagging or side discharge). They’re a solid value for routine replacement, but skip them if you require OEM durability for heavy-duty or mulching use, or if your deck uses non-standard blade geometry.