Grasscool Recycler 22 inch Mulching Atomic Mower Blades Replace Toro 131-4547-03 108-9764-03 for 59534p 20333 20016 20331 20332 21445 21465 22'' Deck Push Mower

What It Is

This is a set of 22-inch mulching blades designed for Toro Recycler push mowers with a 22-inch deck. They replace OEM part numbers 131-4547-03 and 108-9764-03, and are made for models like 59534p, 20333, 20016, 20331, 20332, 21445, and 21465. The “Atomic” design uses a curved, serrated edge to shred clippings finer than standard mulching blades, improving nutrient recycling into the lawn.

Fitment & Compatibility

Before buying, confirm your mower has a 22-inch cutting deck and uses a single, center-mount blade (not a dual-blade system). Measure the blade length from tip to tip: it must be exactly 22 inches, with a 7-point star center hole and 0.5-inch diameter arbor hole. These blades are aftermarket replacements for Toro Recycler models listed above. Check your mower’s model number (on a sticker under the seat or near the engine) against the compatibility list—do not rely solely on the deck size or brand name. Also verify the blade’s offset (curved up at the tips) matches your original; these have a 0.75-inch lift.

Key Things to Know

• Quality & Durability: These are steel blades with a painted finish. They are sharp out of the box but may dull faster than OEM Toro blades on sandy or rocky soil. Inspect after every 10 hours of use.
• Installation Difficulty: Easy—requires a socket wrench (usually 15/16 inch) and a blade removal tool or block of wood to prevent spinning. Torque to 45-55 ft-lbs (check your manual). Reuse the original washer and bolt.
• Common Gotchas: The “Atomic” design produces a very fine mulch, but it can clog in wet, long grass. For best results, mow dry grass and only cut one-third of the blade height at a time. Do not use these for bagging—they are mulching-only blades.
• Balance Check: After installation, test blade balance (hang on a nail through the center hole). If one side dips, it will cause vibration and damage the spindle.

Should You Buy It

Buy these if you own a compatible 22-inch Toro Recycler push mower and want an affordable upgrade to stock mulching blades for finer clippings and better lawn nutrition. They perform well on regular turf but are not ideal for bagging or heavy-duty commercial use. If you need OEM fit without guesswork, stick with Toro 131-4547-03.