54 Inch Mower Deck Blade Fits for Cub Cadet XT1-GT54 XT1-ST54 ZT1-54 Troy Bilt Mustang 54 Craftsman Z5800 Replaces OEM 742P05086-X 742-05086-X (Toothed Mulching) 3 Pack

What It Is

This is a set of three toothed mulching blades designed to fit 54-inch mower decks on select Cub Cadet, Troy-Bilt, and Craftsman zero-turn and lawn tractors. They replace OEM part numbers 742P05086-X and 742-05086-X, and are intended for mulching grass clippings into fine particles rather than side-discharging or bagging.

Fitment & Compatibility

Before buying, confirm your deck is exactly 54 inches (measured blade tip to tip). These blades fit Cub Cadet XT1-GT54, XT1-ST54, ZT1-54, Troy-Bilt Mustang 54, and Craftsman Z5800 models. Check your current blade’s part number—if it’s 742P05086-X or 742-05086-X, these are direct replacements. Measure the center hole diameter (typically 1-inch) and overall blade length (about 20 inches). Verify the blade’s offset and thickness match your existing blade; toothed mulching blades often have a different profile than standard high-lift blades. If your deck uses a different OEM number (e.g., 942-05086), these may not fit.

Key Things to Know

• Quality vs OEM: These are aftermarket blades at a lower price than genuine Cub Cadet parts. Some users report they are slightly thinner or less balanced, so check for vibration after installation.
• Installation: Standard—use a torque wrench to 70-90 ft-lbs, recheck after 5 minutes of use. The toothed edge requires sharpening with a file, not a grinder, to avoid overheating the metal.
• Common gotcha: Toothed mulching blades work best with a mulching plug installed and dry grass. Wet or thick grass can clog the deck, reducing cut quality.
• Pack size: Three blades are included—one for each spindle on a 54-inch deck. No extra hardware (bolts, washers) is provided.

Should You Buy It

Buy this set if you have a compatible 54-inch deck and primarily mulch grass, want a budget-friendly alternative to OEM blades, and are comfortable with minor fitment checks and potential balancing. Avoid if you need high-lift blades for bagging or side-discharge, or if you prefer guaranteed OEM fit and finish.