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 Maxpower 331981B 21-inch mulching blade is made of metal and designed to fit most 21-inch gas-powered lawn mowers, making it a versatile choice if you have a compatible mower. Its length of 21 inches matches standard mower decks well, ensuring good coverage while you mow. The blade comes with a set of washers in various sizes, which helps adapt it to different mower models, adding to its flexibility. The blade has a universal design and a 1-inch center hole, typical for many mowers, which makes installation straightforward for many users.

This blade is recommended exclusively for gas-powered mowers and is not suitable for battery or electric models. It features a gold finish that may help resist rust and improve durability, though it is not powder-coated, so some care might be needed to keep it in good shape over time. The blade weighs about 2 pounds, which could be a consideration for some users.

For those with gas mowers seeking a reliable, universal mulching blade with included hardware for easy fitting, this product is a good match. Users should keep in mind the compatibility limitations and the occasional maintenance required to keep the blade rust-free.