GY20852 GX21784 High Lift Blades Fit for 48 inch John Deere D140 D150 E140 E150 X140 X165 Z255 Z355e Mower Deck Replace AM137757 AM141035 (3 Pack) 

What It Is

This is a 3-pack of high-lift replacement blades designed for 48-inch John Deere mower decks. High-lift blades create stronger upward airflow than standard blades, improving grass clipping discharge and bagging performance, especially in thick or wet grass.

Fitment & Compatibility

Before buying, verify your mower has a 48-inch stamped deck (not fabricated or 54-inch). These blades fit John Deere models including D140, D150, E140, E150, X140, X165, Z255, and Z355e. They replace OEM part numbers AM137757 and AM141035. Measure your existing blade length (should be ~21 inches) and center hole diameter (1 inch). Check that your spindle bolt pattern matches—these blades have a 5-point star center hole. Not compatible with 42-inch or 54-inch decks.

Key Things to Know

• Material quality: Made from heat-treated steel, comparable to OEM blades. Most users report similar durability to John Deere originals.
• Installation: Straight swap—no modification needed. Use a torque wrench to tighten spindle bolts to 70–90 ft-lbs.
• Balance: Lightly sand or file any burrs from the center hole if blades wobble. Check balance with a blade balancer before mounting.
• Lift performance: High-lift design reduces mulching efficiency but improves bagging and side-discharge. Not ideal if you primarily mulch.

Should You Buy It

Buy this set if you have a compatible 48-inch John Deere mower, need better bagging or discharge performance, and want to save money over OEM blades. Skip it if you mulch frequently or have a different deck size.