Rotary 18-1/2" Mower Blades 3-Pack for 54" Decks — AYP 187256 / 532187256 Fit, 5-Point Star Mount, Made in USA

Rotary three-pack replacement mower blades: 18-1/2" straight blades built in the USA to fit 54-inch decks that use AYP part numbers 187256 / 532187256.

If your lawn mower needs fresh cutting edges, these Rotary OEM-style blades provide a direct-fit option for many AYP, Roper, Sears and Husqvarna models that accept the 5-point center mounting pattern. Each blade measures 18-1/2 inches long, 2-1/2 inches wide and .203 inches thick, and this listing supplies the three blades required for a full 54-inch deck replacement. These blades are manufactured in the United States and designed as like-for-like replacements for the AYP 187256 / 532187256 blade numbers.

Which mower models and part numbers do these Rotary blades replace?

These blades align with a range of AYP and related-brand machines that originally used the 187256 or 532187256 blade. Confirm fitment by checking your mower’s deck size, hole pattern and the original part number before ordering.

• Directly replaces AYP part numbers: 187256 and 532187256
• Common compatible models: GTH26K54T, MZ5424S, RZ5424, YTH26V54 and select GTB/LT/2354 series
• Requires three blades to service a 54-inch cutting deck
• Center hole: 5 PT ST (five-point star style mounting)

How are these blades constructed and what are the key dimensions?

Rotary blades are produced to OEM-style specifications with hard-wearing steel and a straight blade profile for bagging and clean cutting. The thickness and mounting pattern are matched to common AYP/Husqvarna deck requirements to ensure stability and safe operation when properly installed.

• Length: 18-1/2 inches (long blade for 54" deck alignment)
• Width: 2-1/2 inches for balanced cutting surface
• Thickness: 0.203 inches for durability and reduced flex
• Center hole: 5 PT ST five-point star mounting for secure fit

What performance and maintenance should I expect from these replacement blades?

When installed and sharpened as needed, these straight Rotary blades provide consistent bagging performance and an even cut across a 54-inch deck. Regular inspection for nicks, bends or wear will help maintain cutting quality and protect your mower’s spindle and deck.

• Designed for bagging and general cutting tasks on residential turf
• Sharpen blades periodically for best results and fuel efficiency
• Replace blades as a matched set on multi-blade decks to maintain balance
• Made in the USA to meet common OEM tolerances

How do I confirm these blades will fit my mower before buying?

Fitment confirmation requires matching the blade part number, measuring the blade dimensions, and verifying the center mounting pattern on your mower spindle. If any of these details differ from your original blade, the replacement may not seat or secure correctly.

• Compare your current blade’s part number (187256 / 532187256) if available
• Verify deck size is 54 inches and three blades are used
• Measure your blade: 18-1/2" x 2-1/2" x 0.203" and 5 PT ST center hole
• Contact a dealer if unsure about compatibility or mounting adapters

Who is this for: Homeowners and service technicians who need a reliable, American-made replacement blade set for 54-inch riding mower decks used on select AYP, Roper, Sears and Husqvarna machines. This three-blade pack suits anyone replacing worn or damaged blades and wanting a like-for-like OEM-style fit that restores bagging performance and balanced operation.