TENGMUJX 48-Inch Toothed Deck Blade — Fits John Deere 100-Series & LA/D Models, OEM Replacement, Heat-Treated Steel

TENGMUJX 48-inch toothed deck blade designed to replace OEM GY20852/GX21786 and restore clean, consistent cutting on compatible John Deere decks.

If your lawn tractor’s 48" deck is leaving uneven strips or struggling with heavier grass, this aftermarket toothed blade from TENGMUJX is built to match the fit and cutting profile of many John Deere 100-series and LA/D models. Manufactured to the dimensions used by the OEM part numbers listed, the blade gives you a practical replacement option that’s durable, simple to install, and backstopped by a one-year warranty.

Will this blade fit my John Deere lawn mower?

Yes — the blade is engineered to fit a wide range of John Deere 100 Series tractors and LA/D models that use a 48" deck. It uses the same 7-point star center hole pattern and matches the OEM mounting and overall dimensions to ensure correct alignment and balance.

• Compatible models: John Deere 145, 155C, LA130, LA140, LA145, LA155, LA165, D140, D150, D160, and related 100-series tractors.
• Replaces OEM numbers: GY20852, GX21786, GX21784, AM137757, AM141035.
• Center hole: 7-point star to match factory spindles and hardware.

What are the exact blade specifications and geometry?

The TENGMUJX blade is sized and shaped to align with factory tolerances so it spins true and delivers a consistent cut. Knowing the precise measurements helps ensure you’re ordering the right replacement and maintaining deck balance.

• Overall length: 17 inches (per blade), width: 2 3/4 inches, thickness: 0.157 inches.
• Designed for a 48" deck setup (blade count and orientation depend on your deck model).
• Toothed cutting edge profile for effective mulching and clipping transfer inside the deck.

How does the blade perform and install?

This blade is made from high-class steel for reliable wear resistance and stiffness during normal mowing. Installation is straightforward for anyone comfortable changing mower blades: remove the old blade, match the center-star hole and bolt pattern, and torque fasteners to the tractor manufacturer’s specifications.

• Material: durable steel with a heat-treated edge for longer life under typical yard conditions.
• Installation: direct-replacement design — aligns with original bolt pattern and center hole.
• Maintenance tip: balance blades after installation and inspect regularly for dings or bends.

What support and warranty come with the purchase?

TENGMUJX backs this blade with a one-year warranty and responsive customer service for fitment or quality questions. If anything arrives damaged or you need guidance on installation, contact the seller to arrange assistance or a replacement under the warranty terms.

• Warranty: one year from purchase for manufacturing defects.
• Customer support: available for fitment checks and replacement guidance.
• Return or replacement depend on the condition and proof of purchase.

Who is this for? This TENGMUJX 48-inch toothed blade is aimed at owners or service technicians of John Deere 100-series and LA/D tractors who need an affordable, OEM-compatible replacement blade. It’s ideal for maintaining mulching performance and even cutting on mid-sized residential decks — especially when your original blade is worn, bent, or missing.