ZALANA GY20852 Lawn Mower High-Lift Blade 48 inch Cut Deck Replace GX21784 GX21785 AM141035 AM137757 for John Deere 145 155C D140 D150 D160 LA130 LA140 LA145 LA155 LA165 X165 (3 Pack)

What It Is

This is a 3-pack of high-lift replacement blades for 48-inch cutting decks, designed to improve grass clipping discharge and bagging performance on select John Deere lawn tractors. Ideal for heavy mowing conditions where standard blades leave clumps.

Fitment & Compatibility

• Deck size: Fits only 48-inch (48") cutting decks. Measure your deck width before ordering.
• Compatible models: John Deere 145, 155C, D140, D150, D160, LA130, LA140, LA145, LA155, LA165, X165. Also fits other models using OEM part numbers GX21784, GX21785, AM141035, AM137757.
• OEM cross-check: These are aftermarket blades, not John Deere OEM. Verify your current blade’s part number matches one of the listed OEM numbers.
• Measurements: Blade length is 20.5 inches, center hole diameter is 1 inch, and the drive pin holes are 0.3125 inches (5/16"). Confirm these match your spindle.
• Lift type: High-lift design—not for mulching or low-lift decks. Ensure your deck and bagger can handle increased air flow.

Key Things to Know

• Installation difficulty: Easy. Use a socket wrench and blade removal tool. Torque blade bolts to 40-55 ft-lbs. Never reuse old bolts.
• Quality: Made from heat-treated steel with a coated finish for rust resistance. Balanced out of the box—no need to sharpen.
• Common gotcha: High-lift blades increase engine load and can throw debris. Keep the discharge chute pointed away from people and property.
• Pack of 3: Good value if you need to replace all three blades at once, but you must replace as a set for balanced cutting.

Should You Buy It

Buy this if you have a compatible 48-inch John Deere tractor, want better bagging or side-discharge performance, and don’t mind aftermarket parts. Avoid if you need mulching blades or have a smaller/larger deck. For $21.24, it’s a solid upgrade over worn OEM blades.