GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack

What It Is

This is a 2-pack of 21-inch mulching blades designed to replace OEM blades on select MTD, Troy-Bilt, Cub Cadet, and Craftsman lawn mowers. They are intended for mulching grass clippings into fine particles that decompose quickly, reducing the need for bagging.

Fitment & Compatibility

Before buying, check three things:

1. Deck size: This blade is exactly 21 inches long—measure your current blade’s length from cutting edge to cutting edge. It will not fit 20-inch or 22-inch decks.
2. Center hole & drive pin: The center hole is a standard 7-point star (also called a “dog bone” or “double D” shape) that fits most MTD-brand spindles. Confirm your mower’s blade adapter matches.
3. Model numbers: Directly cross-reference your mower model (e.g., TB110, TB230, TB240, TB210) or your old blade’s part number (942-0741A, 742-0741A, 742-04100, 942-0741, CMXGZAM100067). This is not a universal blade—it only fits MTD-based decks.

OEM vs. aftermarket: This is a third-party blade, not genuine Cub Cadet. It matches OEM dimensions but may have slightly thinner steel. If you need exact OE specs for commercial use, stick with OEM.

Key Things to Know

• Mulching only: These blades have a curved, high-lift design for mulching. They are not designed for bagging or side discharge. If you switch between modes, you’ll need a different blade set.
• Installation difficulty: Easy—just one bolt per blade. Use a torque wrench to 35-45 ft-lbs (check your mower manual). Reverse threads are common on some MTD models; verify before tightening.
• Sharpness out of box: They come sharp but not razor-finished. A quick light honing before first use improves performance.
• Balance check: After installation, spin the blade by hand to ensure it’s balanced. An unbalanced blade will vibrate and damage the spindle over time.

Should You Buy It

If you own a 21-inch MTD, Troy-Bilt, Cub Cadet, or Craftsman mower with a mulching deck and want a cost-effective replacement for OEM blades, this 2-pack is a solid choice. It’s best for residential use on standard lawns—avoid it if you need bagging blades or have a commercial-grade mower. For the price, it’s a good value if your blade part number matches.