Keycci D140 Blades Compatible with John Dee re 48 inch Mower, GY20852 Blades Fits for John Dee re GX21784 GX21786 AM137757, D140 E140 Z355E LA145 E160 E170 D155 LA130 Z255 S170, 3 Pack

What It Is

These are 48-inch compatible lawn mower blades designed for select John Deere models, sold as a 3-pack for replacing dull or damaged blades on residential riding mowers and zero-turn mowers.

Fitment & Compatibility

Before buying, verify your mower’s deck size is 48 inches—these blades are not universal for all John Deere models. They are listed to fit D140, E140, Z355E, LA145, E160, E170, D155, LA130, Z255, and S170, and cross-reference OEM part numbers GY20852, GX21784, GX21786, and AM137757. Measure your existing blade’s length (approx. 20.5 inches), width, center hole diameter (typically 1 inch or 7/8 inch), and offset. The Keycci set is an aftermarket alternative, not OEM, so double-check that your spindle and blade-mounting pattern match—some John Deere models use a different hole shape or thickness. Also confirm the blade tip is not too long for your deck (e.g., some 48-inch decks require a specific blade length to avoid hitting the deck shell).

Key Things to Know

• Quality & Durability: Customer ratings average 4.2/5 (33 reviews), suggesting decent value for the price, but some users report they may dull faster than OEM blades on heavy or rocky terrain.
• Installation: Straightforward if you have basic tools (socket wrench, torque wrench recommended). Always disconnect the spark plug and block the blade before removal. Torque mounting bolts to manufacturer spec (usually 70-90 ft-lbs) to avoid loosening.
• Common Gotchas: These blades may not have the same lift or mulching capability as OEM—expect a standard side-discharge cut. Check for balance after installation; unbalanced blades cause vibration and damage spindles. Also, verify blade thickness (likely 0.25 inches) matches your spindle’s washer setup to prevent wobble.
• Pack Size: 3-pack means you can replace all blades at once (if your deck uses three blades) or keep spares. Not all 48-inch John Deere decks use three blades—some use two, so confirm your deck’s blade count.

Should You Buy It

If you need a budget-friendly replacement for a 48-inch John Deere residential mower (like the D140 or LA145) and you’re comfortable with aftermarket parts that may not match OEM longevity, this 3-pack is a solid choice. Skip it if you require premium cut quality, mulching blades, or exact OEM fitment for a commercial or heavy-use machine.