10 Best 21 Inch Mulching Blade 2025 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 MTD Genuine Parts 21-inch Mulching Blade is specifically designed to fit lawn mowers manufactured from 1995 onwards, making it a suitable choice for those with older models. The blade is compatible with various top mower brands, including Troy-Bilt, MTD, and Yard Machines, offering flexibility and convenience for users with different equipment.

Its 3-in-1 functionality allows for mulching, bagging, and side discharge, providing comprehensive options for managing grass clippings based on personal preferences and lawn care needs. The star-shaped center hole design ensures a secure fit, simplifying installation and removal during maintenance or blade replacement.

Constructed with durability in mind, this blade can serve as a direct replacement for several specific models, making it a reliable choice without compromising fit or function. While the blade is designed for compatibility with many mowers, users should still verify specific model compatibility to avoid any potential issues. Additionally, the blade's natural finish may not offer the same rust resistance as coated options, potentially affecting longevity.