Oregon 21 Inch Lawn Mower Blade, Mulching Blade for 21" Deck, 21" Length, Replacement for OEM 165833, 175064, 189028, 406712, 176135, 159267, 406706, 532 15 92-67, 532 17 50-52 and More (1 Pack)

What It Is

This is a 21-inch mulching blade from Oregon, designed to fit 21-inch mower decks and replace OEM blades across brands like EGO, Toro, and Craftsman. It’s ideal for mulching grass clippings into fine particles to return nutrients to the lawn.

Fitment & Compatibility

Before buying, confirm your mower deck measures exactly 21 inches (center hole to tip). This blade replaces OEM parts including 165833, 175064, 189028, 406712, 176135, 159267, 406706, 532 15 92-67, and 532 17 50-52. It fits many EGO Power+ models (e.g., LM2100, LM2102SP), plus select Toro, Craftsman, and Husqvarna 21-inch push mowers. Check your blade’s center hole diameter (usually 7/8-inch or 1-inch) and ensure the blade’s offset matches your deck—this blade has a 0.75-inch offset. If your mower uses a star-shaped or multi-hole mount, this won’t work.

Key Things to Know

• Quality: Oregon is a reputable aftermarket brand; this blade is heat-treated and balanced for durability, but it’s not OEM—expect slightly different cutting behavior.
• Installation: Easy with a socket wrench—just remove the old blade, align the center hole, and torque to 30-40 ft-lbs. No special tools needed.
• Common gotcha: Mulching blades require higher engine RPM to shred clippings effectively—don’t mow wet grass or you’ll get clumps.
• Check blade orientation: The curved side should face up toward the deck; installing it upside down will damage your mower and lawn.

Should You Buy It

Buy this if you need a reliable, budget-friendly mulching blade for a 21-inch deck and your mower uses one of the listed OEM numbers. It’s a good fit for EGO owners who want to mulch without paying OEM prices, and the fine-shred design works well on dry, average-height grass. Skip it if you have a different deck size, need a bagging blade, or prefer OEM parts for warranty reasons.