LawnRAZOR Blade for Cub Cadet MTD XT1-LT42 XT2-LX42 42-Inch Deck 742P05177A-X 742-05177A-X (Toothed) 2 Pack

What It Is

The LawnRAZOR Toothed Blade (model 742P05177A-X / 742-05177A-X) is a direct-replacement mulching blade for 42-inch Cub Cadet XT1-LT42 and XT2-LX42 lawn tractors. Its serrated edge cuts grass finer than standard blades, improving mulching and bagging performance.

Fitment & Compatibility

• Deck size: 42-inch (check your deck’s stamped model number—must match “42”)
• OEM reference: Replaces Cub Cadet part 742-05177A (and MTD equivalents 742P05177A, 742-05177A-X)
• Measurements: 20.5 inches long, 2.5 inches wide, 0.1875-inch thick, 1-inch center hole, 7/8-inch diamond-shaped center hole (common on MTD spindles)
• Brands: Fits Cub Cadet XT1, XT2, XT3, and many MTD/RZT/John Deere 42-inch decks using the same spindle pattern—verify your spindle bolt pattern before buying
• What to check: Measure your current blade length and center hole shape. If your deck uses a 5-point star or non-diamond center hole, this blade won’t fit.

Key Things to Know

• Toothed edge works best for mulching – the serrations chop clippings finer, reducing clumping. Less effective for side-discharge or bagging-only use.
• Installation is straightforward – use a torque wrench (40–50 ft-lbs) and a blade removal tool. No special adapters needed for standard MTD spindles.
• Balance is critical – some users report minor imbalance out of the box. Check balance on a balancer before installing; file the heavy side if needed.
• Wear life is average – serrated edges dull faster than standard blades in sandy or rocky soil. Expect 20–30 hours before noticeable performance drop.

Should You Buy It

Buy this if you primarily mulch with a 42-inch Cub Cadet XT1/XT2 and want finer clippings without upgrading to a gator-style blade. It’s a solid OEM-replacement option at a fair price, but skip it if you need a standard lift blade for bagging or side-discharge, or if your deck uses a non-diamond spindle hole.