Terre Products, 3 Pack Medium Lift Lawn Mower Blades, 54 Inch Deck, Compatible with John Deere GX21380, GY20679, GY20684, GY20686, John Deere 100 Series D170, E180, G110, 190C, LA150, LA175

What It Is

This is a 3-pack of medium-lift mower blades designed for 54-inch John Deere decks. They offer a balance between bagging performance and side-discharge capability, making them a solid choice for standard residential mowing.

Fitment & Compatibility

Before buying, confirm your deck is exactly 54 inches wide—measure if unsure. These blades replace OEM part numbers GX21380, GY20679, GY20684, and GY20686. Compatible with John Deere models: 100 Series D170, E180, G110, 190C, LA150, LA175. They are aftermarket blades, not OEM, so check that the center hole shape (usually a 5-point star) and blade length (around 18.5 inches) match your current blades. Measure your old blades from tip to tip and compare.

Key Things to Know

• Quality: Made from heat-treated steel with a hardened edge; user reviews (4.8/5) indicate good durability and sharpness out of the box.
• Installation: Straightforward swap if you have a socket set and torque wrench—tighten to 70-90 ft-lbs. Use a blade stop or wedge to lock the spindle.
• Gotchas: Medium lift means less suction than high-lift blades, so heavy, wet grass may clog. They are not universal—do not assume fit on non-John Deere decks.
• Balance: Each blade is individually balanced, but check with a balancer after install for vibration-free cutting.

Should You Buy It

If you own a compatible John Deere 54-inch deck and need a reliable, affordable replacement set that works well for typical lawn care, this 3-pack is a strong value. Avoid if you require OEM parts or need high-lift blades for tough bagging conditions.