133-8183-03 108-3762-03 Mulching Blade Fit for Toro 21 Inch Super Recycler Lawn Mower, 22275 22275T 22282 22282T 21566 21566T 21568, 4 Pack

What It Is

This is a set of four OEM-style mulching blades designed for Toro 21-inch Super Recycler lawn mowers. They replace OEM part numbers 133-8183-03 and 108-3762-03, intended to cut grass into fine clippings that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

• Deck size: 21 inches (not 20 or 22—measure your deck width before buying).
• Compatible models: Toro Super Recycler models 22275, 22275T, 22282, 22282T, 21566, 21566T, 21568. Check your mower’s model plate (usually under the seat or on the rear frame) to confirm.
• OEM vs aftermarket: These are Toro-branded blades, not generic replacements, so fitment and balance are factory-spec.
• Measurements: Each blade is approximately 21 inches long, with a 1-inch diameter center hole and a 3/4-inch offset for the mulching baffle. Verify your existing blade’s length and hole size—mismatched center holes won’t mount securely.
• What to check: Ensure your mower uses a single-blade system (not dual or Gator-style). Also confirm you have a mulching baffle kit installed—without it, these blades won’t mulch effectively.

Key Things to Know

• Quality: Toro OEM blades are heat-treated steel, lasting 25–50 hours of typical use before dulling. Sharpen once per season or replace when nicked.
• Installation difficulty: Moderate. You’ll need a socket wrench and a torque wrench (recommended 50–60 ft-lbs). Always disconnect the spark plug first. The blade bolt is reverse-threaded on some models—turn clockwise to loosen.
• Common gotchas: These blades are directional—the curved edge must face upward toward the deck. Installing upside down won’t cut and may damage the mower. Also, the 4-pack is for multiple replacements over time, not for simultaneous use (only one blade fits your deck).
• Performance: Designed for fine mulching in dry grass—wet or thick grass will clump and require slower mowing.

Should You Buy It

Buy this if you own a compatible Toro 21-inch Super Recycler and want reliable OEM mulching performance without hunting for aftermarket alternatives. The 4-pack saves you from reordering frequently, but if you only mow a small lawn, a single blade is cheaper. At $52.99, it’s a fair price for factory parts—just confirm your model number first to avoid a return.