Mower Blades GY20852 / GX21784 / AM141035 for John Deere 48-Inch Deck

Overview

These aftermarket GY20852 / GX21784 mower blades for John Deere 48-inch decks are available in 3-pack and 6-pack quantities for select John Deere lawn tractors and zero-turn mowers using the listed blade-number path.

Use this listing when your original blade number matches GX21784, AM137757, AM141035, or GY20852, and your deck uses three 17-inch blades with the same center-hole pattern, blade dimensions, and deck layout.

Key Features

• Aftermarket mower blade set for select mower deck applications
• Available pack quantities: 3-Pack, 6-Pack
• Replacement path: GX21784 / AM137757 / AM141035 / GY20852
• Common deck size: 48 inch
• Blade length: 17 inch
• Blade style: Mulching, Standard
• Use the original blade number and physical measurements to confirm fitment

Compatible John Deere Models

The supplier cross-references this blade family to select John Deere lawn tractors and zero-turn mowers equipped with compatible 48-inch mower decks.

John Deere Lawn Tractors

• 145
• 155C
• D140
• D150
• D160
• LA130
• LA140
• LA145
• LA155
• LA165
• X140
• X165

John Deere Zero-Turn Mowers

• Z245 EZtrak with compatible 48-inch deck
• Z255 EZtrak with compatible 48-inch deck
• Z355E ZTrak with compatible 48A or 48-inch top-discharge deck

Fitment note: These model names are supplier-provided fitment examples and do not mean every production version uses the same blades. Match your original blade number, 17-inch blade length, center-hole pattern, three-blade deck layout, and complete mower model before ordering.

References to snowblowers, snow blades, and material collection systems were removed because they are accessory catalog entries and do not determine mower-blade fitment.

Replaces OEM Part Numbers

• GX21784
• AM137757
• AM141035
• GY20852

Blade Specifications

• Blade length: 17 inch
• Blade width: 2-3/4 inch
• Blade thickness: 0.17 inch
• Common deck size: 48 inch
• Blade type: Mulching, Standard

Common Symptoms of Worn Mower Blades

• Uneven cut quality
• Grass tearing instead of cutting cleanly
• Visible blade wear, cracks, bends, or rounded cutting edges
• Deck vibration from bent or unbalanced blades

Quick Ship Fulfillment

This item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement numbers, fitment notes, and specifications shown in this listing.

Why Buy From PTO Direct USA

• Focused replacement parts for mower deck and PTO repair
• Part-number-first listings to help reduce fitment mistakes
• Clear replacement numbers and fitment notes before you order
• Fast, practical support if you need help checking compatibility

Need Help Confirming Fitment?

If you are not sure whether this blade set fits your mower, send us your mower model number, deck size, and the part numbers from your original blades. We can help you compare them before you order.

FAQ

Will this fit all 48 inch decks?

No. This blade set fits select applications only. Match your original blade number, blade length, center-hole style, deck layout, and mower model before ordering.

Which package quantity should I choose?

Choose the pack quantity that matches your deck blade count and the number of complete blade changes you want to keep on hand.

What should I check before installing?

Compare blade length, center-hole pattern, lift style, deck layout, and original blade number against your mower or OEM diagram. Stop installation if the blades do not match your original setup.