10 Best 21 Inch Mulching Blade 2025 in the United States

The Maxpower 331528B Mulching Blade is designed for 21-inch mowers and is compatible with various models, including MTD, Cub Cadet, Troy-Bilt, and Craftsman. One of its strengths is its broad compatibility, making it a versatile choice for multiple mower brands. The blade is made of durable material, which contributes to its longevity and effective mulching performance.

It has a bow tie center hole pattern, ensuring a secure fit on compatible mowers. The blade measures 21 inches in length and 2-1/4 inches in width, fitting well within the standard size for mowers in this category. The product is not discontinued and ranks well in the Lawn Mower Blades category, indicating its popularity and reliability.

At 1.6 pounds, the blade is lightweight, which may affect the ease of installation. The Maxpower 331528B is a reliable option for those needing a replacement mulching blade compatible with several popular mower brands.

The Grasscool 21 Inch Mulching Blade offers strong compatibility with several Troy Bilt, MTD, Cub Cadet, and Craftsman lawn mowers, making it a versatile choice for many users. Its 21-inch length and 9/64-inch thickness are suitable for robust mowing tasks, including cutting overgrown weeds and rugged terrain. The blade's design features curves that enhance mulching, bagging, and side discharging, recycling grass clippings back into the soil as nutrients for healthier lawn growth.

It boasts a high-lift design that significantly increases bagging capacity and reduces clogging, which can improve mowing efficiency. Additionally, the blade undergoes rigorous testing to ensure superior performance, including hardness, balance, and field tests. However, it's crucial to check the center hole pattern (Bow Tie spindle) for compatibility to avoid installation issues, and the painted cutting edges will wear off during mowing, which might require sharpening for a neat cut.

The blade has a strong finish to prevent rust and protect hands during installation, although this coating will diminish over time. Users should ensure it matches their mower’s spindle type to avoid complications.

The MaxPower 331737B mulching blade is designed for 21-inch cutting decks and fits a wide range of popular mower brands like Craftsman, Husqvarna, and Poulan, making it a versatile replacement option. It is made in the USA and built to meet or exceed original equipment manufacturer (OEM) standards, which suggests solid durability and reliable performance. The blade features a 5/8-inch center hole, ensuring it fits securely on compatible mowers. Its construction material and finish are designed to resist wear and corrosion, which is important for enduring typical lawn conditions. The blade thickness and design promote effective mulching, helping to finely cut grass clippings for better lawn health.

One of its strong points is the broad compatibility with many OEM numbers, so it’s easy for users to check if this blade matches their mower. The blade’s weight and dimensions might be slightly bulkier than some OEM blades, which could affect balance if not perfectly matched. Also, since it’s a universal replacement, it may not offer the exact optimized fit or cutting edge shape of some brand-specific blades. This blade is best for lawn owners who want a reliable, well-constructed mulching blade that works with many 21-inch decks and value quality without paying a premium for brand-specific parts.