8TEN LawnRAZOR Mower Blade for MTD Cub Cadet RZT S54 54 Inch Deck 742-0677 942-0677 (Toothed) 3 Pack

What It Is

The 8TEN LawnRAZOR toothed blade is a direct-replacement aftermarket blade designed for MTD and Cub Cadet zero-turn mowers with a 54-inch deck, such as the RZT S54. Its serrated (toothed) edge improves cutting performance on thick, wet, or overgrown grass by providing a sawing action.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 54 inches (measured blade tip to tip). This 3-pack replaces OEM part numbers 742-0677 and 942-0677, fitting Cub Cadet RZT S54, RZT 50, RZT 54, and many MTD, Troy-Bilt, and Yard-Man zero-turn models with the same spindle spacing. Measure your existing blade length (should be ~20.5 inches), center hole diameter (1 inch), and thickness (0.25 inch). Check your deck’s blade offset—these are typically flat or slightly lifted—and verify your spindle pattern matches. If your mower uses a different OEM number (e.g., 742-0677A), cross-reference with 8TEN’s official fitment list.

Key Things to Buy

• Quality: Made from heat-treated alloy steel with a toothed edge that stays sharper longer than standard blades, but the teeth can dull faster on sandy or rocky terrain.
• Installation: Simple bolt-on replacement; torque blade bolts to 70-90 ft-lbs (check your manual). Use a blade removal tool or block wood to prevent spinning.
• Balance: Blades come pre-balanced, but always check with a balancer after installation to avoid vibration and spindle wear.
• Fitment Gotcha: The toothed design adds weight (~0.5 lbs more per blade than OEM), which may slightly increase spindle load and fuel consumption on older decks.

Should You Buy It

Buy this 3-pack if you own a 54-inch Cub Cadet or MTD zero-turn and regularly cut thick, damp, or neglected grass that standard blades struggle to lift. It’s a solid value at ~$13 per blade, but avoid it if you mow sandy soil or fine St. Augustine grass—the teeth can shred or dull quickly.