CUB CADET 742P05177A-X Xtreme 21.23" Blade S-Shaped Enduro XT1 XT2 42" Decks 4-Pack

What It Is

This is a 4-pack of S-shaped, high-lift mulching blades designed for Cub Cadet XT1 and XT2 lawn tractors with 42-inch decks. The Xtreme Enduro blades are built for heavy-duty cutting and bagging performance, ideal for homeowners with medium to large lawns.

Fitment & Compatibility

• Deck size: Only fits 42-inch cutting decks. Do not use on 46-inch or 50-inch decks.
• OEM part number: 742P05177A-X (Cub Cadet genuine replacement). Directly replaces OEM blade 742P05177A.
• Model compatibility: XT1 (LT42, LT42E, LT42KH, LT42FAB) and XT2 (LX42, LX42KH, LX42FAB, LX42EFI) series. Also fits some RZT and ZT1 zero-turn models with 42” decks—verify your deck model.
• Blade measurements: 21.23 inches long, 0.25 inches thick, 1-inch center hole, 7/16” offset (S-shape). Measure your old blade’s length and center hole before buying.
• What to check: Confirm your deck is 42” (measure blade tip to tip), and that your spindle hole is 1-inch. If your old blade has a different offset or straight shape, this S-shaped blade may change cutting height.

Key Things to Know

• High-lift design: Great for bagging and side-discharge, but not ideal for mulching in wet grass—will clog.
• Installation: Easy DIY job with a socket wrench and torque wrench (tighten to 70-80 ft-lbs). Use thread locker on spindle bolts.
• Sharpness out of box: Some users report they need a light sharpening before first use. Check for burrs.
• Durability: Thicker than standard blades (0.25” vs typical 0.1875”), so they last longer but may require a stronger engine to spin efficiently.

Should You Buy It

Buy this if you have a Cub Cadet XT1 or XT2 with a 42” deck and want OEM-quality blades that excel at bagging and heavy cutting. Skip it if you primarily mulch in damp conditions or have a smaller deck—you’ll get better results with a mulching-specific blade set.