POSEAGLE GX21380 Lawn Mower Blades for John Deere 54" Deck — 18-5/8" Medium-Lift Pre-Sharpened Set with Hardware

POSEAGLE GX21380 mower blades are direct-fit, pre-sharpened replacement blades engineered to restore cutting performance on John Deere 54" decks.

These blades are designed as precise replacements for several John Deere OEM numbers and common aftermarket equivalents, offering the correct length, mounting pattern, and medium-lift profile needed for reliable bagging, mulching, or discharge on 54-inch decks. Each blade ships ready-to-install with matching nuts and washers so you can get your tractor back to work quickly.

What exactly fits my tractor and mounting pattern?

The POSEAGLE GX21380 blades match the 7-point star center hole and are sized to replace numerous John Deere part numbers for 54" decks. They are made to the same length, width, and thickness as the original equipment they replace.

• Blade length: 18-5/8"; width: 2-5/8"; thickness: 0.21"
• Center hole: 7-point star to match John Deere mounting hubs
• Compatible OEM references: John Deere GX21380, GY20684, GY20679, GY20686
• Also cross-references: Oregon 92-103, 330-704

How do these blades affect cutting and grass handling?

The blades carry a medium-lift, angled profile engineered to create airflow under the deck that lifts grass blades for a uniform cut. That same airflow helps move clippings into a bag or keeps them finely mulched, depending on deck setup and attachments.

• Medium lift (1.3") balances bagging and mulching performance
• Angled cutting face promotes consistent grass lift for even cuts
• Pre-sharpened edges reduce initial setup time

What’s included and how easy is installation?

POSEAGLE includes the hardware needed for a straightforward swap: blade nuts and washers sized for common John Deere decks. Blades arrive pre-sharpened and coated to resist corrosion during storage, so you can install them quickly with basic tools.

• Includes 3x GX21694 blade nuts (5/8-18) and 3x M149625 washers (5/8)
• Pre-sharpened edges and protective coating—coating will wear off during first use
• Installation typically requires standard wrenches and safety chocks or blocks

Are these blades durable and matched to OEM specs?

They are manufactured to the measure and hole pattern used by John Deere for 54" decks, and finished with a protective coating to reduce rust before first use. The steel gauge and thickness are chosen to withstand normal residential mowing loads when used as intended.

• Thickness: 0.21" steel for residential/utility deck durability
• Protective finish for corrosion resistance in storage and shipping
• Quality control targets fit and balance to minimize vibration

Who this is for: The POSEAGLE GX21380 blades suit owners of John Deere 54-inch mower decks—particularly 100-series tractors and similar models—who need a direct-fit replacement with included hardware. If you want a pre-sharpened, medium-lift blade set that aligns with common John Deere OEM numbers and aftermarket cross-references, this kit provides a quick, tool-friendly upgrade to get your deck cutting evenly again.