Set of 3 John Deere High Lift Bagging Blades GX20434 L120 L130

What It Is

This is a set of three high-lift bagging blades designed for select John Deere lawn tractors. High-lift blades create stronger airflow to improve grass clipping discharge into a bagger, making them ideal for frequent bagging or mulching in heavy grass.

Fitment & Compatibility

• Deck size: Fits 48-inch cutting decks only. Measure your deck width before ordering.
• Models: Confirmed fit for John Deere L120, L130, and L100 series with 48-inch decks. Also works on models like LA145, LA165, and X300 series with the same deck.
• OEM vs aftermarket: These are aftermarket blades, not John Deere OEM. They match OEM part number GX20434 and are typically made from hardened steel.
• Measurements: Each blade is approximately 21 inches long with a 1-inch center hole and a 0.25-inch thickness. Verify your current blade length and hole size to ensure a match.
• Check: Inspect your spindle assembly for wear or damage before installation. Bent spindles will cause poor cutting and blade contact.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket wrench, torque wrench (recommended 70-90 ft-lbs), and possibly a blade removal tool. Jack up the mower safely.
• Quality: Aftermarket blades can vary in hardness and balance. Some users report shorter lifespan than OEM, but they cut well initially. Check for warping or dull edges out of box.
• Common gotcha: High-lift blades increase air drag and engine load. They may reduce mower speed or fuel efficiency, especially in thick, wet grass. Not ideal for low-horsepower engines.
• Noise: Expect louder operation due to increased airflow. This is normal for high-lift designs.

Should You Buy It

If you own a John Deere with a 48-inch deck and bag frequently, this set is a cost-effective alternative to OEM blades for improving bagging performance. However, if you prioritize durability or have a small engine, consider OEM blades instead.