21" Lawn Mower Blade, AB2100 Replacement Mulching Blades for EGO Electric Lawn Mowers LM2102SP/LM2100SP/LM2142SP/LM2101/LM2100

What It Is

This is a set of three 21-inch mulching blades designed to replace the factory blades on specific EGO electric lawn mowers. They cut grass into fine clippings that decompose quickly, eliminating the need to bag.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 21 inches and that your model is listed: LM2102SP, LM2100SP, LM2142SP, LM2101, or LM2100. These are aftermarket blades, not OEM EGO parts. Measure the existing blade length, center hole diameter (typically 1 inch), and the distance between the two mounting holes (usually 2.75 inches center-to-center) to verify match. Also check blade thickness—these are 0.15 inches thick.

Key Things to Know

• Installation is straightforward – Use a socket or wrench to remove the single center bolt on each blade. No special tools needed.
• Sharpen or replace annually – Dull blades tear grass, causing brown tips. Replace when nicked or worn beyond sharpening.
• Balance after sharpening – Unbalanced blades cause vibration and damage the spindle. Use a blade balancer or have a shop do it.
• Mulching mode only – These blades are optimized for mulching; they won’t bag or side-discharge as effectively as standard blades.

Should You Buy It

If you own one of the listed EGO 21-inch mowers and want to keep your lawn looking clean without bagging, these are a solid, affordable replacement. They match OEM specs, install easily, and the fine mulch returns nutrients to the soil. Just double-check your exact model and hole spacing before purchase.