D140 Blades Compatible with John Dee re 48 inch Mower, GY20852 Mower Blades Replaces for GX21784 AM137757 AM141035, E160 E170 D155 E140 LA145 LA130 Z255 Z355E S170, 3 Pack

What It Is

This is a three-pack of aftermarket 48-inch deck blades designed to replace OEM parts on select John Deere lawn tractors and zero-turn mowers. They are for cutting grass on residential or semi-commercial properties.

Fitment & Compatibility

Before buying, verify your mower’s deck size is exactly 48 inches (not 42 or 54). These blades replace OEM numbers GX21784, AM137757, and AM141035. Compatible models include John Deere D140, E160, E170, D155, E140, LA145, LA130, Z255, Z355E, and S170. Measure your existing blade length, width, center hole diameter, and thickness—these are 20.5 inches long, 2.5 inches wide, with a 7/8-inch center hole and 0.25-inch thickness. Aftermarket blades may vary slightly in shape or balance from OEM, so double-check your spindle orientation (some decks require offset or curved blades). Always inspect your spindles for wear before installing.

Key Things to Know

• Quality: At $27.99 for three blades, these are budget-friendly. Expect adequate sharpness and durability for typical home use, but they may dull faster than premium OEM or high-carbon aftermarket blades.
• Installation: Straightforward—use a socket wrench and block the blade to prevent rotation. Torque to 35–50 ft-lbs. No special tools needed, but a blade balancer is recommended.
• Common gotchas: Aftermarket blades may not be perfectly balanced out of the box; check and file as needed. Also, verify blade orientation (sharp side toward grass) and ensure the blade bolt is not over-tightened to avoid stripping.
• Deck compatibility: Only fits 48-inch decks—double-check your deck model number (e.g., 48C or 48SD) as some John Deere decks use different blade patterns.

Should You Buy It

Buy these if you have a compatible John Deere 48-inch deck and want an affordable, multi-pack replacement for regular mowing on a standard residential lawn. They’re a solid value for the price, but if you need longer life, higher durability, or a perfect OEM match, consider spending more on genuine John Deere blades.