GY20852 Mower Blades Fit for John Dee re 48" Lawn Mower, GX21784 High Lift Mower Blades Compatible with 145 155C D140 D150 D160 LA130 LA140 LA145, Replace for GX21785 AM137757 AM141035, 3 Pack

What It Is

A set of three high-lift replacement mower blades designed for 48-inch John Deere lawn tractors. The high-lift profile increases airflow for better grass clipping discharge and bagging performance, making them ideal for mulching or collecting leaves.

Fitment & Compatibility

Critical checks before buying:

• Deck size: Fits 48-inch cutting decks only. Measure your deck width to confirm.
• Models: Compatible with John Deere 145, 155C, D140, D150, D160, LA130, LA140, LA145, and similar 48-inch deck tractors.
• OEM cross-reference: Replaces GX21784, GX21785, AM137757, AM141035. Verify your current blade part number matches one of these.
• Measurements: Each blade is 20.5 inches long with a 1-inch center hole and 0.25-inch thickness. Check your blade’s length, hole size, and thickness to ensure a drop-in fit.
• Aftermarket: Not OEM; third-party replacement. Expect similar performance but verify build quality (see below).

Key Things to Know

• Installation: Easy swap—remove old blades, clean spindle, and install new ones. Use a torque wrench to tighten to 40–50 ft-lbs. Left-hand threads on some spindles; check rotation direction.
• High-lift design: Creates more lift for bagging but may cause scalping on uneven ground. Not ideal for low-cut or groomed lawns.
• Durability: Some users report blades dull faster than OEM in sandy or rocky soil. Inspect after heavy use.
• Balance: Out of the box, blades may need balancing. Use a blade balancer to avoid vibration that can damage the spindle.

Should You Buy It

If you have a 48-inch John Deere lawn tractor and primarily bag clippings or need extra lift for leaf collection, this three-pack offers good value at $26.99. It’s a solid budget-friendly alternative to OEM blades, but expect slightly shorter lifespan and check balance before installation. Not recommended for rough terrain or mulching-only use.