10 Best 21 Inch Mulching Blade 2026 in the United States

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 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 MaxPower 331387XB mulching blade is designed to fit 21-inch cutting decks on Toro, Exmark, and Lawn Boy mowers, making it a solid choice if you own one of these brands. Its size closely matches OEM blades with a length of about 20-27/32 inches and a 7/16-inch center hole, which helps ensure a proper fit and easy installation. The blade replaces several OEM part numbers, so checking your mower’s manual to confirm compatibility is important. Made in the USA, it weighs about 1.8 pounds and comes as a single blade in the package.

The blade’s solid customer rating (4.5 out of 5 stars) suggests good performance and durability. The blade’s thickness and design seem suitable for effective mulching, which helps finely chop grass clippings to nourish your lawn. If your mower brand or model isn’t listed among the compatibles, this blade might not fit properly. Also, if you prefer blades with specific coatings to resist rust or wear, the lack of detailed information may be a drawback.

This blade represents a reliable and well-reviewed replacement option for certain 21-inch mowers, especially if you prioritize proper fit and decent quality made in the USA.