Grasscool 42 inch Mower Blades Replace Cub Cadet 742P05177 for Ultima ZT1 ZT2 Enduro XT1 XT2 LT42 LX42 42''Zero Turn Riding with S Shaped Hole 742-05177 742P05177A-X

What It Is

This is a set of three 42-inch aftermarket mower blades designed to replace OEM Cub Cadet part numbers 742P05177, 742-05177, and 742P05177A-X. They fit Cub Cadet Ultima ZT1, ZT2, Enduro XT1, XT2, LT42, and LX42 zero-turn and riding mowers with a 42-inch cutting deck.

Fitment & Compatibility

• Deck size: Only for 42-inch decks. Measure your deck width to confirm.
• Hole pattern: The blades use an S-shaped center hole. Check that your spindle has this shape—round or star holes won’t work.
• Model match: Confirmed for Cub Cadet Ultima ZT1/ZT2, Enduro XT1/XT2, LT42, LX42. Also fits some other brands with the same 42-inch deck and S-hole pattern, but always cross-reference your OEM part number.
• OEM vs aftermarket: These are aftermarket (Grasscool brand), not genuine Cub Cadet. They match the 742P05177 specs but may differ slightly in thickness or material.

Key Things to Know

• Installation: Moderate difficulty. You’ll need a socket wrench and a blade removal tool (or block the blade). Torque bolts to 70-90 ft-lbs.
• Quality: 3.8/5 rating with 13 reviews—some users note they balance well, others report occasional vibration. Check balance before installing.
• Gotcha: The S-shaped hole is less common than standard star or oval holes. If your spindle uses a different pattern, these won’t fit.
• Durability: Made from heat-treated steel, but aftermarket blades typically dull faster than OEM. Expect to sharpen or replace mid-season with frequent use.

Should You Buy It

Buy these if you own a Cub Cadet 42-inch deck with an S-hole spindle and want a budget-friendly replacement for routine mulching or bagging. Skip them if you need premium OEM durability for heavy-duty mowing or if your spindle uses a different hole shape—check first to avoid returns.