CUB CADET 742P05177 21.23" Blade Ultra High-Lift S-Shape Center Hole XT1 XT2 LT42 LX42

What It Is

This is a genuine OEM Cub Cadet 21.23-inch ultra high-lift S-shape blade (part 742P05177) designed for aggressive cutting and superior bagging performance on select Cub Cadet XT1, XT2, LT42, and LX42 lawn tractors.

Fitment & Compatibility

Before purchasing, verify these three things:

• Deck size: This blade is 21.23 inches long and fits 42-inch cutting decks only. It will not work on 46-inch or 50-inch decks.
• Center hole: S-shaped center hole design – measure your spindle’s center hole shape. This is not a standard star or round hole.
• Model check: Confirmed fit for Cub Cadet XT1 (LT42, LX42), XT2 (LX42, LT42), and some LT42/LX42 series. Check your model’s OEM blade part number – if it’s 742P05177, this is a direct replacement. If your current blade is a different OEM number, measure length, center hole shape, and thickness (0.25 inches) before buying.

Key Things to Know

• Quality: Genuine Cub Cadet OEM blade – better steel and heat treatment than most aftermarket options, but costs more.
• Installation: Straightforward swap – single bolt per blade. Torque to 70-90 ft-lbs. Use a blade removal tool or block the blade to prevent spinning.
• Common gotcha: The ultra high-lift design creates more suction for bagging but can throw grass further and may leave uncut strips if deck isn’t level. Not ideal for mulching without a mulching kit.
• Reviews: Mixed 3.7 rating – some report premature dulling or bending on rocky terrain. Inspect after first few uses.

Should You Buy It

Buy this if you have a 42-inch Cub Cadet XT1 or XT2 with the S-shaped center hole, you prioritize OEM fit and bagging performance, and you’re willing to pay a premium for guaranteed compatibility. Skip it if you need a mulching blade, have a different deck size, or want a cheaper aftermarket alternative.