Grasscool D140 Blades for GY20852 E140 LA145 D160 S170 E170 E160 Z355e D155 Z255 LA130 Deck Lawn Mower(Toothed Mulching)

What It Is

The Grasscool D140 toothed mulching blade is an aftermarket replacement blade designed to cut grass clippings into fine particles for nutrient recycling. It is intended for select John Deere lawn mower models with 42-inch, 48-inch, or 54-inch Edge, Accel Deep, or standard cutting decks.

Fitment & Compatibility

Before buying, verify your mower deck size and model. This blade fits John Deere models D140, E140, LA145, D160, S170, E170, E160, Z355e, D155, Z255, and LA130. Cross-reference with OEM part numbers GY20852, GY20853, GY20854, GY20855, GY20999, GY21000, GY21001. Measure your existing blade: these are 21 inches long, 2.5 inches wide, with a 1-inch center hole and 0.5-inch offset. Not compatible with 42-inch decks on older LA series (e.g., LA110, LA120) or any 54-inch deck model not listed. Check deck type (Edge, Accel Deep, or standard) for proper lift and discharge angle.

Key Things to Know

• Quality: Heat-treated steel with a corrosion-resistant coating; user reviews note good durability but occasional balance issues out of the box.
• Installation: Moderate difficulty—requires a socket wrench and torque wrench (recommended 70-90 ft-lbs). Always use thread-locker on bolts and check blade balance after mounting.
• Gotchas: Toothed mulching design may reduce bagging efficiency; best for side-discharge or mulching setups. Not for standard cutting or bagging-only decks.
• Gotcha 2: Verify your deck’s spindle bolt size (typically 5/8-inch or 3/4-inch); this blade uses a 1-inch center hole, so you may need a bushing adapter if your bolt is smaller.

Should You Buy It

If you own a compatible John Deere model and want affordable mulching blades that produce fine clippings, this is a solid choice. It’s not for bagging-heavy users or those with older deck designs not listed. Check balance before installation to avoid vibration issues.