AM130172 Mower Blades Replacement for John Deere GX355,SST16,X324,LT133,LT155, LT160,LT166,LT170,LT180,Select Series Lawn Tractors,Deck Blade Kit Fits 42" Freedom Dedicated Mulching Mower

What It Is

This is a set of three replacement mulching blades for John Deere lawn tractors and Select Series mowers with 42-inch Freedom decks. Designed for dedicated mulching, they cut grass into fine clippings that decompose quickly, reducing the need for bagging.

Fitment & Compatibility

Before buying, verify your mower deck measures exactly 42 inches (blade length is 16.5 inches, center hole 1 inch diameter). These blades fit John Deere models GX355, SST16, X324, LT133, LT155, LT160, LT166, LT170, LT180, and Select Series lawn tractors. They also work on 42" Freedom Dedicated Mulching Mower decks. This is an aftermarket replacement for OEM part AM130172. Cross-check your blade’s part number (stamped on the blade) to confirm. If your deck uses a different blade design (e.g., high-lift or standard), these mulching blades will not perform the same.

Key Things to Know

• Blade orientation is critical: These blades have a distinct mulching wing. Install with the wings pointing upward toward the deck. Wrong orientation will cause poor cut or vibration.
• Torque to spec: Tighten center bolt to 45-50 ft-lbs. Over-tightening can strip the spindle; under-tightening can cause blade to loosen.
• Check spindle condition: Worn or bent spindles will cause uneven wear and vibration. Replace spindles if blades wobble after installation.
• Mulching performance depends on grass condition: Works best when grass is dry and cut frequently. Wet or tall grass will clump and may require bagging.

Should You Buy It

If you own one of the listed John Deere models with a 42" Freedom deck and want fine mulching without bagging, this kit is a solid, cost-effective aftermarket option. It’s best for homeowners who mow regularly and prefer clippings to return to the lawn. Avoid if you need high-lift blades for bagging or have a different deck size.