8 Best Replacement Lawn Mower Blades to Buy in 2025

For corded electric mower owners, the Greenworks 20-inch replacement blade delivers surprising durability at a wallet-friendly price. Crafted from a single forged steel piece, this blade resists warping and chipping far better than stamped or composite alternatives. Its 19.69-inch precision length ensures a snug fit on Greenworks 20″ and 21″ models like the 25022 and 25112, eliminating wobble and uneven cuts. If you’re tired of flimsy blades that dull after two mows, this one offers a robust, no-nonsense upgrade.

During testing on medium-height lawns and slightly damp grass, the blade maintained a clean, even cut with minimal drag on the motor. The one-piece steel construction handled light twigs and minor debris without bending, a testament to its structural integrity. While it doesn’t feature high-lift or mulching curves, it excels in basic bagging and side-discharge tasks, making it ideal for suburban lawns with routine maintenance needs. However, in thick, overgrown patches, it showed slight hesitation, requiring slower passes to avoid clumping.

Stacked against pricier universal blades like Grasscool or UDC, the Greenworks blade is simpler but smarter for its niche. It’s not trying to do everything—just perform reliably on compatible electric mowers. Homeowners with smaller yards who want a low-cost, durable refresh without compatibility guesswork will find it perfect. While it can’t match the airflow of high-lift designs, it offers better value and fit consistency than generic 21” blades marketed as “universal”.

When you’re mowing large, uneven yards, high-lift blades make a tangible difference—and this 2-pack delivers serious airflow and cutting aggression for 42-inch deck mowers. At 21 inches long with a 5-point star center hole, these blades are engineered to fit a wide range of Craftsman, Husqvarna, and Poulan models, including the LT1000 and YTH18542. The 1/6-inch thickness and high-lift design generate powerful suction, lifting grass before cutting and ensuring clippings are expelled cleanly—critical for avoiding clogs in wet or tall grass.

In field tests, these blades excelled in challenging conditions, slicing through damp fescue and overgrown Bermuda with authority. The enhanced airflow significantly improved side-discharge performance, reducing the need for double passes. On flat terrain, they delivered a clean cut, but on slopes, slight vibration was noticeable—likely due to minor balance inconsistencies in mass production. While not OEM, they’re close enough in spec to perform reliably without stressing the engine. Over time, they’ll benefit from periodic sharpening to maintain peak efficiency.

Compared to the Grasscool 942-04308 high-lift blades, this set lacks the same rigorous testing pedigree but offers similar performance at a lower price. It’s a smart choice for budget-conscious riders who need dependable, high-performance blades without brand loyalty. Ideal for homeowners with larger lawns and frequent mowing needs, these blades strike a solid balance between cost and cutting power—outperforming basic replacements while avoiding OEM pricing.

For serious mowing tasks, the Grasscool 942-04308 high-lift blades stand out with aggressive performance and intelligent engineering. Designed for 42-inch decks on Troy-Bilt, Cub Cadet, and RZT42 mowers, these 21-3/16-inch blades feature a 6-point star center hole and 5/32-inch thickness, delivering exceptional durability and rotational stability. The high-lift design creates intense airflow, making them ideal for bagging or side-discharging tall or wet grass—where lesser blades would clog instantly.

Real-world testing confirmed their superior discharge efficiency, especially on overgrown lawns and in humid conditions. The dual-purpose design (bagging and side discharge) works seamlessly, thanks to optimized blade curvature that maximizes suction without overloading the engine. Even after hitting minor debris, the forged steel construction held its shape, and the paint-coated edges provided safe handling during installation. However, owners of S-shaped spindle models must avoid these—compatibility is strict, and mismatched center holes can cause dangerous imbalance.

Next to the UDC 48-inch blades or the Craftsman-compatible 2-pack, the Grasscool set offers better build validation, with Rockwell hardness and field testing confirming durability. It’s the go-to for riders who demand performance and safety from non-OEM parts. While slightly pricier, its 2-in-1 functionality and clog-resistant design make it a smarter long-term investment than basic high-lift alternatives.

If you’re serious about lawn health and mulching efficiency, the Grasscool 942-0741A mulching blade is a game-changer for 21-inch deck mowers. At 21 inches with a bow-tie center hole, this blade is precision-built for Troy-Bilt, Craftsman, and MTD models, ensuring a secure, wobble-free fit. Its mulching-focused curvature repeatedly chops grass into fine particles, promoting faster decomposition and nutrient return—exactly what a true mulching blade should do.

In testing, it excelled in mulch mode, leaving almost no visible clippings even on thick lawns. The 3-in-1 functionality (mulching, bagging, side discharge) adds versatility, and the 50% increased bagging capacity from high-lift design is a real time-saver. The 9/64-inch thickness provides rigidity without overloading the motor, and the painted cutting edges enhance safety during installation. However, in very wet conditions, it required slower mowing to prevent clumping—a common trade-off with deep mulching blades.

Compared to the Toro 59534P mulcher, this Grasscool blade offers broader compatibility and multi-functionality at a similar price. It’s ideal for homeowners who mulch regularly but still want bagging flexibility. With rigorous performance and balance testing, it delivers OEM-level reliability in a universal form—outclassing basic mulching blades in both function and durability.

For EGO electric mower owners, the AB2100 replacement blade is the gold standard in precision and compatibility. Designed exclusively for EGO’s LM2100 and LM2100SP models, this factory-sharpened steel blade ensures optimal balance and cutting efficiency—critical for maintaining battery life and motor health. The 3-in-1 design (mulching, bagging, side discharge) gives users full flexibility without compromising performance, a rare feat in OEM-specific blades.

In real-world use, it delivers a clean, whisper-quiet cut that complements EGO’s electric powertrain. The pre-sharpened edge slices through grass effortlessly, promoting faster regrowth and reducing strain on the motor. During mulching tests, it produced finely chopped clippings that disappeared into the turf, while bagging mode filled the hopper evenly without clogging. Unlike generic blades, it’s perfectly balanced to prevent vibration, which is crucial for lightweight electric decks. However, it’s not user-replaceable with third-party options—you get what EGO designed, nothing more.

Compared to the Greenworks or Toro blades, the AB2100 is less about versatility and more about integration. It’s the best choice for EGO users who prioritize system harmony and long-term reliability. While it costs more than universal blades, its perfect fit and performance make it worth every penny for EGO owners—outperforming aftermarket alternatives in refinement and consistency.

When authentic performance matters, the Toro 59534P Recycler blade delivers true OEM mulching precision for Toro’s 22-inch Recycler mowers. At 21-11/16 inches long with a toothed mulching edge, this blade is engineered to chop, re-cut, and recycle grass clippings back into the soil—Toro’s signature lawn-nourishing system. The 0.150-inch thickness and 7/16″ center hole ensure a secure fit and minimal vibration, preserving deck integrity over time.

In testing, the toothed design proved superior for mulching, breaking down clippings faster than smooth-edged blades. It handled medium-height grass with ease, leaving no visible residue—ideal for eco-conscious homeowners. The compact 2-1/4″ width maintains airflow without overloading the motor, and the genuine Toro steel holds an edge longer than budget alternatives. However, it’s strictly for mulching; bagging or side discharge is less efficient, and it’s not suited for tall or wet grass without multiple passes.

Versus the Grasscool 942-0741A, this blade is more specialized but less versatile. It’s the top pick for Toro Recycler owners who want factory-true mulching. While cheaper than some universal blades, its single-purpose design makes it less flexible—though unmatched in its intended role compared to multi-function mulchers.

For owners of large 48-inch riding mowers, the UDC 3-pack high-lift mulching blades offer exceptional value and performance. At 16-3/4 inches with a 5-point star center hole, these blades are designed for Husqvarna, Poulan, and Craftsman 48-inch decks, including models like the YTH24V48 and PB23H48YT. The 0.187-inch thickness and 1-7/32″ air lift generate powerful suction, making them ideal for high-speed mulching or bagging large lawns.

In real-world testing, the blades handled thick, wet grass with minimal clogging, thanks to strong airflow and sharp leading edges. The 3-pack format ensures long-term supply, reducing downtime during peak mowing season. The pre-sharpened, paint-coated edges enhance safety and prevent rust during storage. While not branded OEM, UDC’s quality control and fit consistency rival genuine parts. On uneven terrain, they showed slight flex—expected at this length—but no structural issues.

Compared to the Grasscool 942-04308, these blades are shorter but optimized for larger decks, focusing on mulching efficiency and durability. They’re perfect for landscapers or large-property owners who need reliable, high-volume performance. While pricier than 2-packs, the 3-blade value and broad compatibility make them a smarter long-term buy than single OEM replacements.