QWD GY20850 Mower Blades 2 Pack for John Deere 42 Inch Deck, Gator Mulching Blades with 7 Point Star Center Hole, Replacement for GX22151 AM141033, Fits D100 D105 D110 D125 D130 S100 E100 E130 LA115

What It Is

The QWD GY20850 2-pack is a set of aftermarket gator-style mulching blades designed for John Deere 42-inch cutting decks. These blades feature a 7-point star center hole and are intended for residential mowing, heavy mulching, and bagging on select John Deere lawn tractors.

Fitment & Compatibility

Before buying, verify your deck is exactly 42 inches (measure from blade tip to blade tip). These blades replace OEM part numbers GY20850, GX22151, and AM141033. The 7-point star center hole fits John Deere spindle shafts—not universal. Compatible models include: D100, D105, D110, D125, D130, S100, E100, E130, LA115, and similar 42-inch deck tractors from the 100-series. Do not assume fit for X300, X500, or other series without checking your deck model number. Aftermarket blades may differ slightly in thickness or balance from OEM.

Key Things to Know

• Gator design: Serrated edges improve mulching and leaf shredding but may wear faster on sandy or rocky lawns.
• Installation: Simple swap if you can access the deck—use a torque wrench (45-55 ft-lbs) and check blade balance on a nail or balancer before mounting.
• Common gotcha: The 7-point star hole is specific to John Deere—will not fit standard 5-point or 6-point spindle shafts from other brands like MTD or Craftsman.
• Set of 2: You need two blades per 42-inch deck; this pack covers one deck. If you have a 48-inch or larger deck, look for a 3-blade set.

Should You Buy It

If you own a compatible John Deere 42-inch deck tractor and want improved mulching performance over standard blades without paying OEM prices, this is a solid, well-rated upgrade. Not ideal for rough terrain or commercial use where blade durability is critical.