3 Pack GY20852 Mower Blades with Hardware for John Deere D140 D160 E140 E160 E170 LA145 S140 Z355E Replace GX21784 AM137757 John Deere 48 inch Mower Blades John Deere Mower Blades 48 inch Deck

What It Is

This is a 3-pack of aftermarket 48-inch mower blades designed to replace OEM blades on select John Deere lawn tractors and zero-turn mowers with a 48-inch deck. They include the necessary hardware (bolts, washers, nuts) for a direct swap.

Fitment & Compatibility

Check your deck size first – these blades only fit 48-inch cutting decks. Compatible models include John Deere D140, D160, E140, E160, E170, LA145, S140, and Z355E. They replace OEM part numbers GX21784, AM137757, and GY20852. Measure your blade length – these are 20.5 inches long, 2.5 inches wide, with a 1-inch center hole and 5-point star drive. If your existing blade is a different length or center hole shape, they won’t fit. Aftermarket, not OEM – quality varies, but this pack includes hardware, saving you a separate trip.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket wrench and a torque wrench (recommended 70-90 ft-lbs). Lift the mower safely and block the deck before swapping.
• Sharpness out of box: Some users report they’re sharp enough for light use but may need a quick touch-up for optimal cut quality.
• Hardware included: Bolts, washers, and lock nuts are provided, but confirm they match your deck’s bolt pattern (usually 5/16-inch or 3/8-inch). If not, use your original hardware.
• Balance: Aftermarket blades can be slightly unbalanced. Spin-test each blade on a balancer before installing to avoid vibration and deck damage.

Should You Buy It

If you own one of the listed John Deere models and want a budget-friendly 3-pack with hardware included, this is a solid value for routine blade swaps. It’s not for pro landscapers needing premium steel or perfect balance out of the box, but for homeowners maintaining a decent cut, it gets the job done. Skip it if you require OEM fitment or have a non-48-inch deck.