21" Lawn Mower Blade Replacement for EGO LM2156SP,LM2135SP,LM2130,LM2130SP,LM2150SP Mower Parts,AB2101D Mulching Blade Set 21 Inch,Black

What It Is

This is a 21-inch mulching blade set (two blades) designed for select EGO cordless lawn mowers. It replaces the OEM AB2101D blade and is meant for users who want finer grass clippings for nutrient recycling, rather than side-discharge or bagging.

Fitment & Compatibility

Before buying, confirm your mower model is on this list: EGO LM2156SP, LM2135SP, LM2130, LM2130SP, LM2150SP. Also verify you have a 21-inch deck—these blades will not fit smaller or larger decks. Measure your existing blade’s center hole diameter and overall length; this set matches OEM AB2101D specs. It is not compatible with EGO’s 20-inch or 22-inch models, or with other brands. If your mower uses a single blade, this set won’t work.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a wrench or socket to remove the center nut and a block of wood to prevent the blade from spinning. Always disconnect the battery first.
• Mulching vs. standard: These blades have a more curved, higher-lift design to recut clippings. They may reduce run time slightly vs. standard blades due to increased drag.
• Balance check: After installing, spin the blade by hand to ensure it’s balanced. An unbalanced blade causes vibration and can damage the spindle.
• Common gotcha: The blade bolt torque spec is ~35-40 ft-lbs. Overtightening can strip the threads; undertightening risks the blade flying off.

Should You Buy It

Buy this if you own one of the listed EGO 21-inch mowers, want a dedicated mulching blade for cleaner lawn appearance, and are comfortable with basic DIY installation. It’s a good value at ~$34 compared to OEM pricing, but skip it if you primarily side-discharge or bag—you won’t see the benefit.