Grasscool Z515E Blades Compatible with John d-eere 54 inch Mower Replace M143520 z375r z515e z530m z445 z425 z525e z345r x570 x590 x500 x530 z435 54'' Deck Zero Turn Tractor UC22010 M152726

What It Is

This is a set of replacement blades designed for 54-inch mower decks used on John Deere zero-turn and lawn tractors. They are aftermarket equivalents to OEM part numbers M143520 and M152726, intended for mulching, bagging, or side-discharge cutting.

Fitment & Compatibility

Before buying, confirm your deck size is exactly 54 inches—this set will not fit 48-inch or 60-inch decks. Check your model against the list: Z375R, Z515E, Z530M, Z445, Z425, Z525E, Z345R, X570, X590, X500, X530, Z435. Also verify your OEM blade part number is M143520 or M152726. Measure your existing blade length (should be about 21 inches) and center hole diameter (usually 7/16” or 5/8”). These are aftermarket blades, so fitment may be slightly looser than OEM; check for proper spindle clearance after installation.

Key Things to Know

• Quality variance: At this price point, expect medium-duty steel that may dull faster than OEM or high-end aftermarket blades. Not ideal for heavy commercial use.
• Installation difficulty: Easy swap if you have a socket set and jack or ramps to lift the deck. Use thread locker on spindle bolts to prevent loosening.
• Sharpness out of box: Blades come sharp but may need a quick edge hone for best cut. Check balance before mounting to avoid vibration.
• Mulching vs. standard: These are universal lift blades—if you need dedicated mulching blades with more wing surface, look for a specific mulching set.

Should You Buy It

Buy these if you own one of the listed 54-inch John Deere models, want a budget-friendly replacement for light residential use, and are comfortable with basic installation. Skip them if you need commercial-grade durability, OEM fit precision, or specialized mulching performance—invest in OEM or higher-end aftermarket blades instead.