8 Best GreenWorks Lawn Mower Blade Replacements to Buy in 2025

Precision-engineered to revitalize your mower, this replacement blade stands out with its robust, one-piece high-carbon steel construction. It arrives pre-sharpened, immediately addressing the common user frustration of ragged, unhealthy cuts that can damage your lawn. This focus on material quality and out-of-the-box readiness makes it a formidable choice for owners of popular 21-inch Greenworks models like the MO40L4413 and MO48L4422.

In real-world testing, the blade’s performance is impressive, delivering a consistently clean and level cut across various grass types. With a length of 20.08 inches and a thickness of 0.126 inches, it provides the necessary rigidity to avoid flexing while ensuring sufficient clearance within the mower deck. The simple installation process, requiring only the removal and tightening of a single fixing nut, means you can achieve a factory-fresh cut quality with minimal downtime and effort.

Compared to multi-pack options like the SummerCool 2-pack, this blade is positioned for the user needing a single, high-quality replacement right now. It’s the ideal choice for homeowners who want a direct, effective upgrade without committing to storing a spare. For those seeking an immediate improvement in lawn health and appearance, this blade offers a superior balance of durable materials and cutting performance over many budget alternatives.

Delivering authentic factory performance, this genuine Greenworks replacement blade set is the definitive solution for the 20-inch Twin Force mower. The kit includes two 9.5-inch blades made from heat-treated steel, a critical feature that ensures they hold a sharp edge longer for precise, clean cutting. This design specifically solves the unique replacement needs of the model 25302, eliminating the guesswork and compatibility issues that can arise with third-party universal blades.

The twin-blade system is engineered for efficiency, creating a powerful vortex that lifts and cuts grass for a beautifully manicured finish. These blades are designed to be slightly shorter than the deck for critical clearance, a detail that underscores their purpose-built engineering. The heat treatment not only enhances sharpness retention but also contributes to the overall durability, allowing the blades to withstand accidental impacts with small debris better than softer steel alternatives.

Unlike the IDEASURE blade which offers a universal fit for multiple deck sizes, this Greenworks set is exclusively for the 25302 mower. This specificity is its greatest strength, guaranteeing perfect balance, fitment, and cutting dynamics as intended by the manufacturer. For owners of the Greenworks Twin Force mower, this is the premier choice for restoring original cutting power and efficiency.

Revitalizing your compact mower is simple with this specialized 14-inch replacement blade, designed specifically for the Greenworks MO48L2212. Its standout feature is its precise compatibility, solving a major pain point for owners of smaller mowers who often struggle to find correctly sized parts. Made from strong steel material, it’s engineered to provide the sharp, tidy cut necessary for maintaining the health and appearance of smaller lawns without overwhelming the mower’s brushless motor.

With a length of 14 inches and a thickness of just 1/16 inch, this blade is lightweight yet durable enough for frequent use on flat or sloping residential terrain. Its sleek design complements the efficiency of the MO48L2212 mower, ensuring a balanced rotation and a clean cut without placing undue strain on the battery. This optimized compatibility ensures your compact mower continues to perform at its peak, handling various mowing scenarios with ease.

In contrast to the larger blades designed for 20-inch or 21-inch mowers, this CLSR2U blade is a niche but essential product. Its target audience is exclusively owners of the Greenworks 14-inch MO48L2212 who need a reliable, no-fuss replacement that fits perfectly. It provides a tailored solution that ensures optimal performance where larger, heavier blades are simply not an option.

Unleash the full potential of your wide-deck mower with the official Greenworks 25-inch replacement blade. This accessory is engineered to deliver a precise, powerful cut across its substantial width, ensuring a healthier and more attractive lawn with fewer passes. Made from high-quality steel, it is built to withstand the rigors of maintaining larger properties, solving the durability concerns associated with oversized, lower-quality blades that can flex or dull quickly.

The primary advantage of this blade is its ability to maintain cutting efficiency over a 25-inch path, a task that demands superior materials and engineering. Its sharp cutting edges and robust design help you mow more effectively, reducing both time and battery consumption. As a genuine Greenworks accessory, it guarantees seamless installation and perfect balance, eliminating vibrations that can occur with poorly fitted third-party alternatives.

When compared to smaller, more common 21-inch blades like the B0F9XX52Z5, this 25-inch blade is in a class of its own, built for heavy-duty residential use. It is the ideal choice for owners of Greenworks’ largest mowers who prioritize authentic parts and maximum cutting performance. While it represents a more significant investment, its official design is essential for maintaining the superior efficiency and cut quality of a premium wide-deck mower.

Transform your lawn care routine with this UPOW 19-inch mulching blade, a specialized upgrade for compatible Greenworks mowers. Its key strength lies in its dedicated mulching design, which finely chops grass clippings and returns them to the soil as natural fertilizer. This directly solves the chore of bagging or raking, while the heat-treated steel construction ensures the complex cutting edges remain sharp for effective, long-lasting performance.

In practice, this blade excels at creating a fine mulch that disappears into the turf, a stark contrast to the clumps left by standard blades. Measuring 18 1/8 inches in length, it is precision-machined for models like the MO40L414, ensuring a balanced spin and efficient power use. The quick-release compatibility makes installation remarkably simple, allowing you to switch between mulching and standard blades with minimal effort and no complex tools.

Unlike a standard replacement blade such as the IDEASURE 25022, this UPOW blade offers a significant functional upgrade rather than a simple replacement. It is the perfect choice for the environmentally conscious homeowner with a 19-inch Greenworks mower who wants to improve lawn health and reduce yard waste. This blade provides a specialized mulching capability that delivers a tangible improvement to your lawn care arsenal.

This SummerCool two-pack offers exceptional value and preparedness for owners of popular 21-inch Greenworks mowers. The standout feature is undoubtedly getting two durable steel blades in one purchase, solving the problem of mid-season downtime when a blade inevitably gets dull or damaged. Each blade arrives pre-sharpened and features a powder-coated finish for added protection during shipping and storage, ensuring it’s ready to go when you need it.

Each blade in the pack performs identically to a high-quality single, with a length of 20.08 inches and a sturdy 0.126-inch thickness delivering clean, precise cuts. The true benefit is having an immediate replacement on hand, allowing for a quick swap to maintain peak cutting performance throughout the entire mowing season. This zero-downtime convenience is a game-changer for anyone who values efficiency and a consistently well-manicured lawn.

Directly compared to single-blade offerings like the SWAPARTS B0CT8LKWZG, this two-pack shifts the focus from a simple repair to smart lawn care strategy. It is the ideal choice for proactive homeowners who understand the importance of a sharp blade and want to secure a full season’s worth of cutting performance upfront. This bundle provides unmatched convenience and long-term value versus purchasing single blades sequentially.

This SWAPARTS blade is a straightforward, no-frills solution for getting your 21-inch Greenworks mower back in action. Its core strength is its simplicity and effectiveness, featuring a sturdy one-piece steel construction designed for a direct fit on popular models like the MO40L4413. It solves the immediate need for a new blade without the complexity or higher cost of specialized or multi-pack options, making it a go-to for a quick, budget-friendly fix.

In terms of performance, this blade delivers exactly what is promised: a clean and tidy cut to restore your lawn’s appearance. With a length of 20.08 inches and a substantial thickness, it’s built to be a durable workhorse that can handle regular mowing tasks efficiently. The focus here is not on advanced features but on reliable, essential function, providing a dependable replacement that gets the job done without hassle.

When positioned against the SummerCool two-pack, the SWAPARTS blade is clearly for the user who values immediacy and economy over long-term planning. It’s the perfect choice for someone who has hit a rock and needs an affordable replacement shipped quickly to finish the yard. For pure utility, this blade delivers the necessary cutting performance at a highly accessible price point.